Document:

EXHIBIT 10.1

                      STOCK AND WARRANT PURCHASE AGREEMENT

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          THIS  STOCK  AND WARRANT PURCHASE AGREEMENT (this "Agreement") is made
                                                             ---------
and  entered  into as of September 28, 2007, by and among The Quercus Trust (the
"Purchaser"),  and WorldWater & Solar Technologies Corp., a Delaware corporation
 ---------
(the  "Company"  or  "WWAT").
       -------        ----

          WHEREAS,  the  Purchaser desires to purchase from the Company, and the
Company desires to sell to Purchaser, shares of common stock and warrants of the
Company  on  the  terms  set  forth  herein;  and

          WHEREAS, the Company is offering the Common Stock pursuant to Rule 506
of  Regulation  D  promulgated under the Securities Act of 1933, as amended (the
"Securities  Act").
  --------------

          NOW,  THEREFORE,  in  consideration  of the foregoing premises and the
mutual  covenants  and  agreements herein contained, and intending to be legally
bound  hereby,  the  parties  hereto  hereby  agree  as  follows:

     1.     Sale  of  Shares.
            ----------------

          1.1     Purchase  and  Sale  of  Shares.  The  Company hereby sells to
                  -------------------------------
Purchaser,  and  Purchaser  hereby  purchases  from the Company, an aggregate of
7,500,000  units  (the  "Units"),  each  consisting of (i) one share (a "Share,"
                         -----                                           -----
collectively  the "Shares") of its common stock, par value $0.001 per share (the
                   ------
"Common Stock"), and (ii) one warrant (a "Warrant," collectively the "Warrants")
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to purchase 1.2 shares of Common Stock, for a purchase price of $1.782 per Unit,
reflecting  a  price  of  $____  per  Share  and  $____ per Warrant. The initial
exercise  price  of  the  Warrant  is  $1.815 per share, in consideration of the
delivery  by  the Company to Purchaser of certificates evidencing the Shares and
Warrants.

          1.2     The  Closing.  The  purchase  and sale of the Units shall take
                  ------------
place  at  the  offices  of Salvo Landau Gruen & Rogers, 510 Township Line Road,
Suite  150,  Blue  Bell,  Pennsylvania  19333,  or at such other location as the
Company  and  Purchaser  mutually  agree,  on  or  before  August  31, 2007 (the
"Closing").  At  the Closing, upon payment for the Units pursuant to Section 1.1
hereof,  the  Company  shall deliver to Purchaser a certificate representing the
Shares  and  a certificate representing the Warrants (the "Warrant Certificate")
                                                           -------------------
in  the  form(s)  set  forth  on  of  Exhibit "A" hereto against delivery to the
Company  of  a  check  or  wire  transfer  in  the  amount of the purchase price
therefor.  The  obligation  of Purchaser to consummate the purchase of the Units
at  the  Closing  is subject to the truth and accuracy of the representation and
warranties  of  the  Company  in  Section  2  below.

     2.     Representations  and  Warranties  of Company.  Except as provided on
            --------------------------------------------
Schedule  2  attached  hereto,  the  Company  hereby  represents and warrants to
Purchaser  that:

          2.1     Organization, Good Standing and Qualification.  The Company is
                  ---------------------------------------------
a  corporation  duly  organized, validly existing and in good standing under the
laws  of  the  State  of  Delaware.  The  Company  has  full corporate power and
authority  to  own  and  hold  its  properties and to conduct its business.  The
Company  is  duly licensed or qualified to do business, and in good standing, in
each  jurisdiction  in  which  the  nature  of  its business requires licensing,
qualification  or  good  standing,  except  for any failure to be so licensed or
qualified  or  in good standing that would not have a material adverse effect on
(i)  the  Company,  (ii)  its  consolidated  results  of  operations, assets, or
financial  condition,  (iii)  its  ability to perform its obligations under this
Agreement  or  (iv)  the  Units  (a  "Material  Adverse  Effect").
                                      -------------------------

          2.2     Consents  and  Approvals.  No  consent,  approval,  order  or
                  ------------------------
authorization  of,  or  registration, qualification, designation, declaration or
filing with, any federal, regional, state or local governmental authority on the
part  of  the  Company  is  required  in connection with the consummation of the
transactions  contemplated  by  this  Agreement.

          2.3     Litigation.  There  are  no  pending  or  overtly  threatened
                  ----------
actions,  claims,  orders,  decrees,  investigations, suits or proceedings by or
before  any  governmental  authority, arbitrator, court or administrative agency
which  would  have  a Material Adverse Effect, or which question the validity of
this  Agreement  or any action taken or to be taken by the Company in connection
herewith, or which might result in any impairment of the right or ability of the
Company  to  enter  into  or  perform  his  obligations  under  this  Agreement.

          2.4     Authorization.  The  Company  has  full  corporate  power  and
                  -------------
authority  to  execute,  deliver and enter into this Agreement and to consummate
the  transactions  contemplated  hereby.  All  action on the part of the Company
necessary  for  the  authorization,  execution, delivery and performance of this
Agreement  by the Company, the authorization, sale, issuance and delivery of the
Units,  the  Shares, the Warrants and the Common Stock issuable upon exercise of
the  Warrants  (the  "Warrant  Shares")  and  the  performance  of the Company's
                      ---------------
obligations  hereunder  has been taken.  The Units, the Shares, the Warrants and
the  Warrant  Shares  have been duly authorized and, when issued and paid for in
accordance  with  this  Agreement,  will  be  validly  issued,  fully  paid  and
non-assessable and will be free and clear of all liens imposed by or through the
Company  other  than  restrictions  imposed  by  this  Agreement  and applicable
securities  laws.  This  Agreement  has  been duly executed and delivered by the
Company,  and  constitutes a legal, valid and binding obligation of the Company,
enforceable  against  the  Company  in  accordance  with its terms except (i) as
limited  by  applicable  bankruptcy,  insolvency, reorganization, moratorium and
other  laws  of  general  application affecting enforcement of creditors' rights
generally  and  by  general  equitable  principles,  or  (ii) as limited by laws
relating  to  the  availability  of  specific performance, injunctive relief, or
other  equitable  remedies.

          2.5     Compliance  With  Other  Instruments.
                  ------------------------------------
               (a)  The  execution and delivery by the Company of this Agreement
and the consummation of the transactions contemplated hereby will not (i) result
in the violation of any provision of the Certificate of Incorporation or By-laws
of  the  Company,  (ii)  result  in  any  violation  of  any law, statute, rule,
regulation,  order,  writ,  injunction,  judgment  or  decree  of  any  court or
governmental  authority  to  or  by which the Company is bound or (iii) conflict
with,  or result in a breach or violation of, any of the terms or provisions of,
or  constitute  (with  due notice or lapse of time or both) a default under, any
lease,  loan  agreement,  mortgage, security agreement, trust indenture or other
agreement  to  which  the Company is a party or by which it is bound or to which
any  of  its  properties  or  assets  is  subject, nor result in the creation or
imposition  of  any lien upon any of the properties or assets of the Company, in
the  cases  of  clauses  (ii) and (iii) above, only to the extent such conflict,
breach,  violation,  default  or  lien  reasonably could, individually or in the
aggregate,  have  or  result  in  a  Material  Adverse  Effect.

               (b) No consent, approval, license, permit, order or authorization
of,  or  registration,  declaration  or  filing  with, any court, administrative
agency  or  commission or other governmental authority remains to be obtained or
is  otherwise  required  to  be  obtained  by the Company in connection with the
authorization,  execution  and delivery of this Agreement or the consummation of
the  transactions  contemplated  hereby, including, without limitation the issue
and  sale  of the Units, the Shares, the Warrants and the Warrant Shares, except
filings  as may be required to be made by the Company with (i) the United States
Securities  and  Exchange  Commission ("SEC") and (ii) state "blue sky" or other
                                        ---
securities  regulatory  authorities.

          2.6     Reports;  Financial  Statements.  WWAT's Annual Report on Form
                  -------------------------------
10-KSB for the years ended December 31, 2005 and December 31, 2006 and Quarterly
Reports  on  Form 10-QSB for the quarters ended March 31, 2007 and June 30, 2007
(the  "Reports")  have  been  filed with the SEC and the Reports complied in all
       -------
material  respects  with  the rules of the SEC applicable to such Reports on the
date  filed with the SEC, and the Reports did not contain, on the date of filing
with  the  SEC,  any  untrue  statement of a material fact, or omit to state any
material  fact  necessary  to  make  the  statements  therein,  in  light of the
circumstances  in  which they were made, not materially misleading.  The Reports
have  not  been  amended, nor as of the date hereof has WWAT filed any report on
Form  8-K  since  June  30, 2007 other than as set forth on Schedule 2.6 hereto.
                                                            ------------
All  of the consolidated financial statements included in the Reports (the "WWAT
                                                                            ----
Financial  Statements"):  (a)  have  been prepared from and on the basis of, and
---------------------
are  in  accordance  with,  the  books  and  records  of WWAT and with generally
accepted  accounting  principles  applied  on  a  basis  consistent  with  prior
accounting  periods;  (b) fairly and accurately present in all material respects
the  consolidated  financial  condition of WWAT as of the date of each such WWAT
Financial  Statement  and  the results of its operations for the periods therein
specified;  and  (c)  in  the  case  of  the  annual  financial  statements, are
accompanied  by  the  audit  opinion  of  WWAT's independent public accountants.
Except  as  set forth in Schedule 2.6 or in the WWAT Financial Statements, as of
                         ------------
the  date  hereof,  WWAT has no liabilities other than (x) liabilities which are
reflected  or reserved against in the WWAT Financial Statements and which remain
outstanding  and  undischarged as of the date hereof, (y) liabilities arising in
the  ordinary course of business of WWAT since June 30, 2007, or (z) liabilities
incurred  as  a  result  of  the  transactions  contemplated  by the Transaction
Documents or which were not required by generally accepted accounting principles
to  be  reflected  or reserved on the WWAT Financial Statements.  Since June 30,
2007,  except  as set forth on Schedule 2.6 hereto, there has not been any event
                               ------------
or  change  which  has  or  will  have a Material Adverse Effect and WWAT has no
knowledge  of  any  event  or  circumstance that would reasonably be expected to
result  in  such  a  Material  Adverse  Effect.

          2.7     Capitalization.  Schedule  2  sets  forth  the  authorized and
                  --------------   -----------
outstanding  capital  stock  of  the  Company,  currently and on a fully-diluted
basis, and other than as set forth in Schedule 2, the Company has not issued any
                                      ----------
capital  stock, or any securities convertible into, or exchangeable for, capital
stock,  or  entered  into  any  written or oral commitment with respect thereto.

          2.8     Permits.  The  Company  has  all franchises, permits, licenses
                  -------
and similar authorizations necessary for the conduct of its business, and is not
in  default  of  any  such  authorizations, where the absence or default of such
authorization  could  have  a  Material  Adverse  Effect.

          2.9     Income Tax Returns.  WWAT and each entity owned or controlled,
                  ------------------
directly  or  indirectly  by  WWAT  or  in which it has a fifty percent (50%) or
greater  interest  (each, a "Subsidiary") has filed all federal and state income
                             ----------
tax returns which are required to be filed, and have paid, or made provision for
the  payment  of,  all  taxes  which have become due pursuant to said returns or
pursuant  to  any  assessment  received  by  WWAT or any Subsidiary, except such
taxes,  if  any,  as  are being contested in good faith and as to which adequate
reserves  have  been provided.  WWAT has no knowledge of any pending assessments
or  adjustments  of  the  income  tax  payable  of WWAT or its Subsidiaries with
respect  to  any  year.

          2.10     Environmental Matters.  None of the operations of WWAT or any
                   ---------------------
Subsidiary  is  the  subject  of  any  federal or state investigation evaluating
whether  any  remedial  action  involving  a  material  expenditure is needed to
respond  to  a  release  of  any  toxic or hazardous waste or substance into the
environment.  To  WWAT's knowledge, neither WWAT nor any Subsidiary has received
notice  of  any  actual or threatened claim, investigation, proceeding, order or
decree  in  connection  with  any  release  of  any  toxic or hazardous waste or
substance  into  the  environment.

          2.11     Offering.  Subject  in part to the truth and accuracy of each
                   --------
Investor's  representations set forth in Section 3 of this Agreement, the offer,
                                         ---------
sale  and  issuance  of the securities contemplated by this Agreement are exempt
from  the registration requirements of the Securities Act, and the qualification
or  registration  requirements  of  the  Act  or other applicable blue sky laws.
Neither  the Company nor any authorized agent acting on its behalf will take any
action  hereafter  that  would  cause  the  loss  of  such  exemptions.

          2.12     Patents  and  Trademarks.  The Company possesses all patents,
                   ------------------------
patent rights, trademarks, trademark rights, service marks, service mark rights,
trade  names,  trade name rights and copyrights (collectively, the "Intellectual
                                                                    ------------
Property")  necessary  for  its  business without, to its knowledge (but without
--------
having  conducted any special investigation or patent search), any conflict with
or  infringement  of  the  valid  rights  of  others and the lack of which could
materially  and  adversely  affect  the  operations  or  condition, financial or
otherwise,  of  the  Company,  and  the  Company  has not received any notice of
infringement  upon  or  conflict  with  the  asserted  rights  of  others.

          2.13     Insurance.  The Company has in full force and effect fire and
                   ---------
casualty  insurance  policies  with  such  coverages  in  amounts  (subject  to
reasonable  deductibles)  customary  for  companies  similarly  situated.

          2.14     Related  Party  Transactions.  No  existing  contractual
                   ----------------------------
obligation  of WWAT or its Subsidiaries is with or for the direct benefit of (i)
any  party  owning,  or  formerly owning, beneficially or of record, directly or
indirectly,  in  excess of five percent (5%) of the outstanding capital stock of
WWAT,  (ii)  any director, officer or similar representative of WWAT, (iii)  any
natural  person related by blood, adoption or marriage to any party described in
(i)  or  (ii),  or  (iv)  any  entity in which any of the foregoing parties has,
directly  or  indirectly,  at  least  a five percent (5%) beneficial interest (a
"Related  Party").  Without limiting the generality of the foregoing, no Related
 --------------
Party,  directly or indirectly, owns or controls any material assets or material
properties  which  are  used in WWAT's business and to the knowledge of WWAT, no
Related  Party,  directly  or  indirectly,  engages  in  or  has any significant
interest  in  or  connection  with any business which is, or has been within the
last  two years, a competitor, customer or supplier of WWAT or has done business
with  WWAT  or  which currently sells or provides products or services which are
similar  or  related  to the products or services sold or provided in connection
with  the  Business.

          2.15     No  Anti-Dilution  Rights.  The  transactions  contemplated
                   -------------------------
hereby  will  not trigger any anti-dilution provisions contained in any existing
shareholder  agreements.

          2.16     Full  Disclosure.  No  representation,  warranty, schedule or
                   ----------------
certificate  of  WWAT  made  or  delivered pursuant to the Transaction Documents
contains  or will contain any untrue statement of fact, or omits or will omit to
state  a  material fact the absence of which makes such representation, warranty
or  other  statement  misleading.

     3.     Representations  and  Warranties  of  Purchaser.  Purchaser  hereby
            -----------------------------------------------
represents  and  warrants  to,  and  agrees  with,  the  Company  that:

          3.1     Litigation.  There  are  no  claims  before  any  governmental
                  ----------
entity  or  arbitrator  pending  or,  to  such  Purchaser's knowledge, currently
threatened  against  or  with respect to such Purchaser relating to or affecting
the  Units, which question the validity of this Agreement or any action taken or
to  be  taken by such Purchaser in connection herewith, or which might result in
any  impairment  of  the  right  or  ability  of such Purchaser to enter into or
perform  its  obligations  under  this  Agreement.

          3.2     Awareness of Company Performance.  Purchaser acknowledges that
                  --------------------------------
(i)  it  has  received and reviewed the Company's financial statements (a) as of
and  for  the  year  ended December 31, 2006 and (b) as of and for the six-month
period  ended  June 30, 2007, (ii) it has received or has had full access to all
the information Purchaser considers necessary or appropriate to make an informed
decision  with  respect to the purchase of the Units pursuant to this Agreement,
and  (iii)  it  has had an opportunity to ask questions and receive answers from
the  Company  regarding  the  Company's  financial  performance  and  to  obtain
additional  information (to the extent the Company possessed such information or
could acquire it without unreasonable effort or expense) necessary to verify any
information  furnished  to  Purchaser  or  to  which  Purchaser  had  access.

          3.3     Restricted  Securities.  Such  Purchaser  understands that (i)
                  ----------------------
the  Units  are  characterized  as  "restricted  securities"  under  the federal
securities  laws  inasmuch  as  they  are  being  acquired from the Company in a
transaction not involving a public offering, (ii) under such laws and applicable
regulations such securities may be resold without registration under federal and
state  securities  laws  only  in  certain  limited circumstances, and (iii) the
Company  may require a legal opinion of such Purchaser's counsel with respect to
unregistered  transfers.

          3.4     Accredited  Investor.  Purchaser  represents  that  it  is  an
                  --------------------
"accredited  investor"  within the meaning of Regulation D promulgated under the
Securities  Act.

          3.5     Legends.  Such  Purchaser  understands  that  the certificates
                  -------
evidencing  the  Units  will  bear  substantially  the  following  legends:
     THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933,
AS  AMENDED.  THEY MAY NOT BE SOLD, OFFERED FOR SALE, PLEDGED OR HYPOTHECATED IN
THE ABSENCE OF A REGISTRATION STATEMENT IN EFFECT WITH RESPECT TO THE SECURITIES
UNDER  SUCH  SECURITIES ACT OR AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY
THAT  SUCH  REGISTRATION  IS NOT REQUIRED OR UNLESS SOLD PURSUANT TO RULE 144 OF
SUCH  SECURITIES  ACT.

          3.6     Investment  Purposes.  The  Units  will  be  acquired  for
                  --------------------
investment for Purchaser's own account, not as a nominee or agent, an not with a
view  to  the  public  resale  or distribution thereof within the meaning of the
federal  or  state  securities  laws,  and Purchaser has no present intention of
selling,  granting  any  participation  in,  or otherwise distributing the same.
Purchaser  further  represents  that  he  or  it  does  not  have  any contract,
undertaking, agreement or arrangement with any person to sell, transfer or grant
participations to such person or to any third person, with respect to any of the
Units.

     4.     Certain  Covenants  of  WWAT.
            ----------------------------

          4.1     Right to Request Registration.  Upon the written request of
                  -----------------------------
Purchaser at any time the Company complies with the eligibility requirements of
General Instruction I to Registration Statement on Form S-3 (or any successor
form) to register the resale of the Company's Common Stock on a registration
statement on such form under the Securities Act, the Company shall use
commercially reasonable efforts to promptly file with the SEC, cause to be
declared effective and maintain the effectiveness of, a registration statement
on such form providing for the resale on a continuous basis, pursuant to Rule
415, by Purchaser of such number of Shares and Warrant Shares requested by
Purchaser to be registered thereby.  Such  registration shall be on terms
customarily agreed to for such registration rights, and at the request of either
party the parties hereto shall enter into a more detailed agreement setting
forth the registration rights of Purchaser hereunder.

          4.2     Registration  and  Listing.
                  --------------------------
               (a)     In  the  event  the  Company  determines,  in  its  sole
discretion, to register a public offering of its securities under the Securities
Act,  or  in  the alternative, grants registration and related rights to another
shareholder without registering a public offering, the Company shall provide the
Purchaser  registration  and  related  rights with respect to the Shares and the
Warrant  Shares  which  shall  include reasonable and customary indemnification,
filing  delay  agreements,  agreement not to sell, underwriting and the like, on
terms  as  favorable  to  the  Purchaser as are granted to any current or future
stockholder  of  the  Company  and in connection therewith the Purchaser and the
Company  shall  agree  to  such  other registration rights as are reasonable and
customary,  including indemnification, filing delay provisions, agreement not to
sell, underwriting arrangements and the like.  The rights of the Purchaser under
this  Section 4.2(a) shall inure to the benefit of the transferee in the case of
a  transfer  to  an  affiliate  or  to  a  transferee  of Shares and/or Warrants
representing  at  least twenty-five percent (25%) of the Common Stock (including
Common  Stock  issuable upon exercise of the Warrants) purchased hereunder.  The
registration obligations of the Company shall terminate five (5) years after the
date  hereof.

               (b)     If  any  shares  of  Common  Stock  issued  or  issuable
hereunder  (the  "Registrable  Shares") require registration with or approval of
                  -------------------
any  governmental  authority  under any federal or state or other applicable law
before such Common Stock may be issued or delivered, WWAT will in good faith and
as  expeditiously  as  possible  endeavor  to cause such Common Stock to be duly
registered or approved, as the case may be, unless such registration or approval
is required solely because of a breach of a Purchaser's representation contained
in  Article 3.  So long as the Common Stock is quoted on the OTC Bulletin Board,
NASDAQ or listed on any national securities exchange, WWAT will, if permitted by
the rules of such system or exchange, quote or list and keep quoted or listed on
such  system  or  exchange  all  Common  Stock  issued  or  issuable  hereunder.

          4.3     REPORTS UNDER SECURITIES EXCHANGE ACT OF 1934.
                  ---------------------------------------------
With a view to making available to the holders the benefits of Rule 144
promulgated under the Securities Act and any other rule or regulation of the
Commission that may at any time permit a holder to sell securities of the
Company to the public without registration or pursuant to a registration
statement on Form S-3, the Company agrees to use commercially reasonable efforts
to:

               (a)     make  and  keep public information available, as required
by  Rule  144(c)  under  the  Securities  Act;

               (b)     file  with  the  Securities  and Exchange Commission in a
timely  manner all reports and other documents required of the Company under the
Securities Act and the Securities Exchange Act of 1934 (the "Exchange Act"); and
                                                             ------------

               (c)     furnish  to  any  holder,  so long as the holder owns any
Registrable  Shares,  forthwith  upon  request  (i)  a  written statement by the
Company  that  it  has complied with the reporting requirements of Rule 144, the
Securities  Act and the Exchange Act, or that it qualifies as a registrant whose
securities  may be resold pursuant to a registration statement on Form S-3, (ii)
a  copy  of  the  most recent annual or quarterly report of the Company and such
other  reports  and  documents  so  filed  by  the Company, and (iii) such other
information as may be reasonably requested in availing any holder of any rule or
regulation  of  the  Commission which permits the selling of any such securities
without  registration  or  pursuant  to  such  form.

The rights of the Purchaser under this Section 4.3 shall inure to the benefit of
the  transferee  in the case of a transfer to an affiliate or to a transferee of
Shares  and/or  Warrants  representing at least twenty-five percent (25%) of the
Common  Stock  (including  Common  Stock issuable upon exercise of the Warrants)
purchased  hereunder.  The  obligations  of  the  Company under this Section 4.3
shall  terminate  five  (5)  years  after  the  date  hereof.

          4.4     RESERVATION OF SHARES.  Subject to Section 1(d) of the
                  ---------------------
Warrant, the Company shall at all times reserve and keep available out of its
authorized Common Stock, solely for the purpose of issue or delivery upon
exercise of the Warrants, such number of shares of Common Stock as shall then be
issuable or deliverable upon the exercise of all Warrants.  Such shares of
Common Stock shall, when issued or delivered in accordance with the terms of the
Warrants, be duly and validly issued and fully paid and non-assessable.

     5.     Indemnification.
            ---------------

          5.1     Indemnification  by  WWAT.  In  addition to all other sums due
                  --------------------------
hereunder  or  provided for in this Agreement, WWAT agrees to indemnify and hold
harmless the Purchaser and its respective "Affiliates" (as defined in Rule 12b-2
of  the  General  Rules  and  Regulations  under  the  Exchange  Act)  and their
respective  officers,  directors,  agents,  representatives,  employees,
subsidiaries,  partners  and  controlling persons (each, an "indemnified party")
                                                             -----------------
from  and  against  any  and  all  losses,  claims, damages, expenses (including
reasonable  fees,  disbursements  and  other  charges  of  counsel)  or  other
liabilities  ("Liabilities")  resulting  from  any  breach  of  any  covenant,
               -----------
agreement,  representation  or  warranty  of  WWAT  in this Agreement; provided,
however,  that  WWAT  shall  not  be  liable under this Section 5.1: (a) for any
amount  paid in settlement of claims without WWAT's consent (which consent shall
not be unreasonably withheld) or (b) to the extent that it is finally judicially
determined  that such Liabilities resulted primarily from the willful misconduct
or  bad  faith  of such indemnified party; provided, further, that if and to the
                                           -----------------
extent  that such indemnification is held, by final judicial determination to be
unenforceable,  in whole or in part, for any reason, WWAT shall make the maximum
contribution  to the payment and satisfaction of such indemnified Liability.  In
connection  with  the  obligation of WWAT to indemnify for expenses as set forth
above,  WWAT  further  agrees  to  reimburse each indemnified party for all such
expenses (including reasonable fees, disbursements and other charges of counsel)
as  they  are  incurred by such indemnified party; provided, however, that if an
                                                   --------- -------
indemnified  party  is reimbursed hereunder for any expenses, such reimbursement
of  expenses shall be refunded to the extent it is finally judicially determined
that  the Liabilities in question resulted primarily from the willful misconduct
or  bad  faith  of  such  indemnified  party.

          5.2     Notification; Procedure.  Each indemnified party under Section
                  -----------------------
5.1 will, promptly after the receipt of notice of the commencement of any action
or other proceeding against such indemnified party in respect of which indemnity
may  be  sought  from  WWAT  under  Section  5.1,  notify WWAT in writing of the
commencement  thereof.  The  omission of any indemnified party so to notify WWAT
of  any  such action shall not relieve WWAT from any liability which it may have
to  such  indemnified party (i) other than pursuant to Section 5.1 or (ii) under
Section 5.1 unless, and only to the extent that, such omission results in WWAT's
forfeiture  of substantive rights or defenses.  In case any such action or other
proceeding  shall  be  brought against any indemnified party and it shall notify
WWAT  of the commencement thereof, WWAT shall be entitled to participate therein
and, to the extent that it may wish, to assume the defense thereof, with counsel
reasonably  satisfactory  to such indemnified party; provided, however, that any
                                                     -----------------
indemnified  party  may,  at  its  own  expense,  retain  separate  counsel  to
participate  in  such  defense.  Notwithstanding the foregoing, in any action or
proceeding  in  which  both  WWAT  and an indemnified party is, or is reasonably
likely to become, a party, such indemnified party shall have the right to employ
separate counsel at WWAT's expense and to control its own defense of such action
or  proceeding  if,  in  the  reasonable  opinion of counsel to such indemnified
party,  (a)  there  are  or  may be legal defenses available to such indemnified
party  or  to other indemnified parties that are different from or additional to
those available to WWAT or (b) any conflict or potential conflict exists between
WWAT  and  such  indemnified  party that would make such separate representation
advisable;  provided,  however,  that  in no event shall WWAT be required to pay
            --------   -------
fees  and  expenses under this sentence of Section 5.1 for more than one firm of
attorneys  in any jurisdiction in any one legal action or group of related legal
actions.  The  Company  agrees  that  WWAT  will  not, without the prior written
consent  of  the  Purchaser,  settle,  compromise or consent to the entry of any
judgment  in  any  pending or threatened claim, action or proceeding relating to
the  matters contemplated hereby (if any indemnified party is a party thereto or
has been actually threatened to be made a party thereto) unless such settlement,
compromise  or  consent  includes  an unconditional release of the Purchaser and
each other indemnified party from all liability arising or that may arise out of
such  claim,  action  or  proceeding.  No  such  settlement  shall  impose  any
restriction  on the future conduct of any indemnified party without such party's
consent,  which may be withheld in such party's discretion.  The rights accorded
to  indemnified  parties  hereunder  shall be in addition to any rights that any
indemnified  party  may  have at common law, by separate agreement or otherwise.

     6.     Survival  of  Representations  and Warranties.  All representations,
            ----------------------------------------------
warranties and agreements made by WWAT and Purchaser in this Agreement or in any
certificate  or  other  instrument  delivered  pursuant hereto shall survive the
Closing and any investigation and discovery by WWAT or by Purchaser, as the case
may  be,  made  at any time with respect thereto; provided, however, that, other
                                                  --------  -------
than  with  respect  to  Section  2.7  (for which there shall be no time limit),
neither  Purchaser  nor  WWAT  shall  have  any  liability  to the other for any
misrepresentation,  inaccuracy or omission in any representation or warranty, or
any breach of any representation or warranty, unless the party asserting a claim
with  respect  to any thereof gives to the other written notice of such claim on
or  before  the  date  which  is  two  years  following  the  Closing  Date.

     7.     Miscellaneous.
            -------------

          7.1     Entire  Agreement.  This  Agreement  contains  the  entire
                  -----------------
agreement  among  the parties with respect to the sale and purchase contemplated
hereby.

          7.2     Governing  Law.  This  Agreement  shall  be  governed  by  and
                  --------------
construed  under  the  laws  of  the  State  of  Delaware.

          7.3     Counterparts.  This  Agreement  may be executed in two or more
                  ------------
counterparts,  each  of  which  shall  be  deemed  an original, but all of which
together  shall  constitute  one  and  the  same  instrument.

          7.4     Severability.  The  invalidity of any portion hereof shall not
                  ------------
affect  the  validity, force, or effect of the remaining portions hereof.  If it
is  ever  held that any restriction hereunder is too broad to permit enforcement
of  such  restriction  to  its fullest extent, the parties agree that a court of
competent  jurisdiction  may  enforce  such  restriction  to  the maximum extent
permitted  by  law  against those for whom it may be enforceable, and each party
hereby  consents  and  agrees  that  such  scope  may  be  judicially  modified
accordingly  in  any  proceeding  brought  to  enforce  such  restriction.

          7.5     Further  Assurances.  The  parties  hereto  shall,  without
                  -------------------
additional  consideration,  execute  and  deliver  or  cause  to be executed and
delivered  such  further  instruments  and  shall take or cause to be taken such
further  actions  as  are necessary to carry out more effectively the intent and
purpose  of  this  Agreement.

          7.6     Successors  and Assigns.  Except as otherwise provided herein,
                  -----------------------
the  terms  and conditions of Sections 4.2 and 4.3 of this Agreement shall inure
to  the  benefit of and be binding upon the respective successors and assigns of
the  parties  (including  transferees  of  any  securities).  Nothing  in  this
Agreement,  express or implied, is intended to confer upon any party, other than
the  parties  hereto  or  their  respective  successors and assigns, any rights,
remedies,  obligations  or  liabilities  under  or  by reason of this Agreement,
except  as  expressly  provided  in  this  Agreement.

          7.7     Titles  and  Subtitles.  The titles and subtitles used in this
                  ----------------------
Agreement  are  used  for  convenience  only  and  are  not  to be considered in
construing  or  interpreting  this  Agreement.

          7.8     Notices.  All notices required or permitted hereunder shall be
                  -------
in  writing and shall be deemed effectively given: (i) upon personal delivery to
the party to be notified, (ii) when sent by confirmed telex or facsimile if sent
during normal business hours of the recipient, if not, then on the next business
day; (iii) five (5) days after having been sent by registered or certified mail,
return  receipt  requested,  postage  prepaid; or (iv) one (1) day after deposit
with  a  nationally  recognized overnight courier, specifying next day delivery,
with  written  verification of receipt.  All communications shall be sent to the
address  as  set  forth on the signature page hereof or at such other address as
such  party  may  designate by ten (10) days advance written notice to the other
parties  hereto.

          7.9     Finder's  Fee.  Each  party  represents that it neither is nor
                  -------------
will  be  obligated  for  any finders' fee or commission in connection with this
transaction.  Purchaser  agrees  to  indemnify  and to hold harmless the Company
from  any  liability  for  any  commission  or  compensation  in the nature of a
finders'  fee (and the costs and expenses of defending against such liability or
asserted  liability)  for  which  Purchaser or any of its trustees, employees or
representatives  is  responsible.  The  Company  agrees  to  indemnify  and hold
harmless  Purchaser from any liability for any commission or compensation in the
nature  of  a finders' fee (and the costs and expenses of defending against such
liability  or  asserted liability) for which the Company or any of its officers,
employees  or  representatives  is  responsible.

          7.10     Expenses.  The  Company shall pay all costs and expenses that
                   --------
it  incurs  with respect to its negotiation, execution, delivery and performance
of  this  Agreement  and, if the Closing is effected, shall pay the actual legal
fees  and  costs of Greenberg Glusker Fields Claman & Machtinger LLP, counsel to
Purchaser,  in  an  amount  not  to  exceed $15,000.  If any action at law or in
equity  is  necessary  to  enforce or interpret the terms of this Agreement, the
prevailing  party  shall  be  entitled  to reasonable attorney's fees, costs and
necessary  disbursements in addition to any other relief to which such party may
be  entitled.

          7.11     Amendments  and  Waivers.  Any  term of this Agreement may be
                   ------------------------
amended  and  the observance of any term of this Agreement may be waived (either
generally  or  in  a  particular  instance  and  either  retroactively  or
prospectively), only with the written consent of the Company and Purchaser.  Any
amendment  or waiver effected in accordance with this paragraph shall be binding
upon  each  holder  of any securities purchased under this Agreement at the time
outstanding  (including securities for which Warrants are exercisable), and each
future  holder  of  all  such  securities  and  the  Company.

          7.12     Aggregation  of  Stock.  All  shares  of  Common  Stock  and
                   ----------------------
Warrants  held or acquired by affiliated entities or persons shall be aggregated
together  for  the  purpose  of determining the availability of any rights under
this  Agreement.

                            [SIGNATURE PAGE FOLLOWS]

<PAGE>
          IN WITNESS WHEREOF, the parties have executed this Agreement as of the
date first above written.

PURCHASER:
---------
THE QUERCUS TRUST

By:  /s/  David  Gelbaum
     ------------------------
     David Gelbaum, Trustee

Address:
2309 Santiago Drive
Newport, California 92660

COMPANY:
-------

WORLDWATER & SOLAR TECHNOLOGIES CORP.

By:  /s/ Quentin T. Kelly
     ---------------------------------------
Name:  Quentin T. Kelly
Its:   Chairman and Chief Executive Officer

Address:
200 Ludlow Drive
Ewing, New Jersey 08638EXHIBIT 10.2

THIS  WARRANT AND ANY SHARES ACQUIRED UPON THE EXERCISE OF THIS WARRANT HAVE NOT
BEEN  REGISTERED  UNDER  THE  SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT BE
SOLD  OR  OTHERWISE  TRANSFERRED  EXCEPT  PURSUANT  TO AN EFFECTIVE REGISTRATION
STATEMENT  FILED  UNDER  SUCH  ACT OR PURSUANT TO AN EXEMPTION FROM REGISTRATION
UNDER  SUCH  ACT.  THIS  WARRANT  MAY  NOT BE SOLD, TRANSFERRED, HYPOTHECATED OR
ASSIGNED  TO  ANY  OTHER  PERSON  OR  ENTITY,  EXCEPT  AS  SET  FORTH  HEREIN.

                        WARRANT TO PURCHASE COMMON STOCK

                      WORLDWATER & SOLAR TECHNOLOGIES CORP.

Number of Shares of Common Stock: 9,000,000

Date of Issuance: September 28, 2007 ("Issue Date")

WorldWater & Solar Technologies Corp., a Delaware corporation (the "Company"),
hereby certifies that, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, Quercus Trust, the registered
holder hereof, or its permitted assigns (the "Holder"), is entitled, subject to
the terms set forth below, to purchase from the Company, at the Exercise Price
(as defined below) then in effect, upon surrender of this Warrant to Purchase
Common Stock (including any Warrants to Purchase Common Stock issued in
exchange, transfer or replacement hereof, the "Warrant"), at any time or times
(subject to Section 1(d) hereof) on or after the date hereof (the "Issue Date"),
but not after 11:59 p.m., New York time, on the Expiration Date (as defined
below), nine million (9,000,000) fully paid nonassessable shares of Common Stock
(as defined below) (the "Warrant Shares").  Except as otherwise defined herein,
capitalized terms in this Warrant shall have the meanings set forth in Section
14.  This Warrant is the Warrant to purchase Common Stock (this "Warrant")
issued pursuant to that certain Stock and Warrant Purchase Agreement, dated as
of the date hereof, by and between the Company and the Holder (the "Stock and
Warrant Purchase Agreement").

     1.     EXERCISE OF WARRANT.

     (a)     Procedure for Exercise.  Subject to the terms and conditions hereof
             ----------------------
(including Section 1(d) hereof), this Warrant may be exercised by the Holder on
any day on or after the Issue Date, in whole or in part, by (i) delivery of a
written notice, in the form attached hereto as Exhibit A (the "Exercise
Notice"), of the Holder's election to exercise this Warrant and (ii) payment to
the Company of an amount equal to the applicable Exercise Price multiplied by
the number of Warrant Shares as to which this Warrant is being exercised (the
"Aggregate Exercise Price") in cash or by wire transfer of immediately available
funds.  The Holder shall not be required to deliver the original Warrant in
order to effect an exercise hereunder.  Execution and delivery of the Exercise
Notice with respect to less than all of the Warrant Shares shall have the same
effect as cancellation of the original Warrant and issuance of a new Warrant
evidencing the right to purchase the remaining number of Warrant Shares.  On or
before the first (1st) Business Day following the date on which the Company has
received each of the Exercise Notice and the Aggregate Exercise Price (the
"Exercise Delivery Documents"), the Company shall transmit by facsimile an
acknowledgment of confirmation of receipt of the Exercise Delivery Documents to
the Holder and the Company's transfer agent (the "Transfer Agent").  On or
before the third (3rd ) Business Day following the date on which the Company has
received all of the Exercise Delivery Documents (the "Share Delivery Date"), the
Company shall (X) provided that the Transfer Agent is participating in The
Depository Trust Company ("DTC") Fast Automated Securities Transfer Program,
upon the request of the Holder, credit such aggregate number of Warrant Shares
to which the Holder is entitled pursuant to such exercise to the Holder's or its
designee's balance account with DTC through its Deposit Withdrawal Agent
Commission system, or (Y) if the Transfer Agent is not participating in the DTC
Fast Automated Securities Transfer Program, issue and dispatch by overnight
courier to the address as specified in the Exercise Notice, a certificate,
registered in the Company's share register in the name of the Holder or its
designee, for the number of shares of Common Stock to which the Holder is
entitled pursuant to such exercise.  Upon delivery of the Exercise Delivery
Documents, the Holder shall be deemed for all corporate purposes to have become
the holder of record of the Warrant Shares with respect to which this Warrant
has been exercised, irrespective of the date such Warrant Shares are credited to
the Holder's DTC account or the date of delivery of the certificates evidencing
such Warrant Shares, as the case may be.  If this Warrant is submitted in
connection with any exercise pursuant to this Section 1(a) and the number of
Warrant Shares represented by this Warrant submitted for exercise is greater
than the number of Warrant Shares being acquired upon an exercise, then the
Company shall as soon as practicable and in no event later than three Business
Days after any exercise and at its own expense, issue a new Warrant (in
accordance with Section 7(d)) representing the right to purchase the number of
Warrant Shares purchasable immediately prior to such exercise under this
Warrant, less the number of Warrant Shares with respect to which this Warrant is
exercised.  No fractional shares of Common Stock are to be issued upon the
exercise of this Warrant, but rather the number of shares of Common Stock to be
issued shall be rounded up to the nearest whole number.  The Company shall pay
any and all taxes which may be payable with respect to the issuance and delivery
of Warrant Shares upon exercise of this Warrant.

(b)     Exercise Price.  For purposes of this Warrant, "Exercise Price" means
        --------------
$1.815, subject to adjustment as provided herein.

(c)     Company's Failure to Timely Deliver Securities.  If the Company shall
        ----------------------------------------------
fail for any reason or for no reason to issue to the Holder within three (3)
Business Days of receipt of the Exercise Delivery Documents, a certificate for
the number of shares of Common Stock to which the Holder is entitled and
register such shares of Common Stock on the Company's share register or to
credit the Holder's balance account with DTC for such number of shares of Common
Stock to which the Holder is entitled upon the Holder's exercise of this
Warrant, and if on or after such Trading Day the Holder purchases (in an open
market transaction or otherwise) shares of Common Stock to deliver in
satisfaction of a sale by the Holder of shares of Common Stock issuable upon
such exercise that the Holder anticipated receiving from the Company (a
"Buy-In"), then the Company shall, within three (3) Business Days after the
Holder's request and in the Holder's discretion, either (i) pay cash to the
Holder in an amount equal to the Holder's total purchase price (including
brokerage commissions, if any) for the shares of Common Stock so purchased (the
"Buy-In Price"), at which point the Company's obligation to deliver such
certificate (and to issue such Warrant Shares) shall terminate, or (ii) promptly
honor its obligation to deliver to the Holder a certificate or certificates
representing such Warrant Shares and pay cash to the Holder in an amount equal
to the excess (if any) of the Buy-In Price over the product of (A) such number
of shares of Common Stock, times (B) the Closing Bid Price on the date of
exercise.

(d)     Authorization of Common Stock.  The Purchaser and the Company agree and
        -----------------------------
acknowledge that (i) the Company does not have currently authorized sufficient
shares of unissued Common Stock to allow for the exercise of the Warrant, (ii)
the Company's board of directors (the "Board") has approved an amendment
("Amendment") to the Company's Certificate of Incorporation to increase the
authorized number of Common Stock to 400,000,000, which would authorize
sufficient shares of Common Stock to allow the exercise of the Warrant in full,
(iii) the Board has approved the holding of a meeting of Shareholders to
consider and approve the Amendment, and has voted to recommend to Shareholders
that the Amendment be approved, and (iv) the Company has authorized "blank
check" preferred stock with respect to which the board of directors of the
Company has the power to designate the rights, preferences and privileges.  In
light of the foregoing, the Company agrees (x) to use commercially reasonable
efforts to cause the Amendment to be approved by Shareholders and filed with the
Delaware Secretary of State as soon as practicable, and to thereafter at all
times cause there to be sufficient authorized and unissued shares of Common
Stock and other securities to allow the Warrant to be exercised in full (or, if
the Preferred Stock described below has been issued, to allow the Preferred
Stock to be converted into Common Stock and other securities in full, and (y)
upon the written request of Purchaser, on or prior to the earlier of one year
following the date hereof and 10 days prior to the record date ( the "Record
Date") for any matter to be presented to shareholders (other than for matters
the filing of a preliminary proxy statement is not required pursuant to Rule
14a-6, as currently in effect) or for determining any other shareholder rights,
the Company will file with the Delaware Secretary of State a Statement of
Designation establishing a new class of preferred stock (the "Preferred Stock")
with the following rights, preferences and privileges:  each share of Preferred
Stock shall have rights, preferences and privileges equivalent to 1,000 shares
of Common Stock, and shall in addition be automatically convertible into Common
Stock at such time as the Company has authorized and unissued sufficient shares
of Common Stock to allow such conversion.  The Company shall provide the
Purchaser notice at least 30 days prior to any Record Date and at least 30 days
prior to the filing of a Certificate of Designation meeting the requirements of
this Section 1(d) describing any transaction requiring the filing of a
Certificate of Determination pursuant to this Section 1(d) and shall consult
with the Purchaser as to the form and substance of the Certificate Designation,
which shall contain such provisions as the Purchaser shall request and the
Company shall approve, such approval not to be unreasonably withheld.  This
Warrant shall not be exercisable until the earlier of the filing of the
Amendment (or a comparable amendment increasing the authorized number of shares
of Common Stock), or the filing of a Certificate of Determination as described
above.

(e)     Automatic Exercise.  Purchaser will submit for exercise one half of the
        ------------------
number of Warrant Shares represented by this Warrant if, at any time after the
Issue Date, the closing price for the Common Stock for five consecutive trading
days exceeds $3.63 with an average volume of at least 2.8 million shares, with
the price and volume adjusted for stock splits or similar events at any time,
and will submit for exercise the balance of the Warrant Shares represented by
this Warrant if the closing price for the Common Stock for five (5) consecutive
trading days exceeds $3.63 with an average volume of at least 2.8 million
shares, with the price and volume adjusted for stock splits or similar events on
or after nine months thereafter.  Each exercise shall be made no later than
thirty (30) days following the receipt of written notification from the Company
of the date on which the obligation arises.

(f)     Disputes.  In the case of a dispute as to the determination of the
        --------
Exercise Price or the arithmetic calculation of the Warrant Shares, the Company
shall promptly issue to the Holder the number of Warrant Shares that are not
disputed.

(g)     Issue Tax.  The issuance of certificates for shares of Common Stock upon
        ---------
exercise of any Warrant shall be made without a charge to the Warrantholder for
any issuance tax in respect thereto provided that the Company shall not be
required to pay any tax which may be payable in respect of any transfer involved
in the issuance and delivery of any certificate in a name other than that of the
Warrantholder.

(h)     Closing of Books.  The Company will at no time close its transfer
        ----------------
books against the transfer of the shares of Common Stock issued or issuable upon
the exercise of this Warrant in any manner which interferes with the timely
exercise of this Warrant.

     2.     ADJUSTMENT OF EXERCISE PRICE AND NUMBER OF WARRANT SHARES.  The
Exercise Price and the number of Warrant Shares shall be adjusted from time to
time as follows:

     (a)     Adjustment upon Subdivision or Combination of Common Stock.  If the
             ----------------------------------------------------------
Company at any time on or after the Issue Date subdivides (by any stock split,
stock dividend, recapitalization, reorganization, scheme, arrangement or
otherwise) one or more classes of its outstanding shares of Common Stock into a
greater number of shares, the Exercise Price in effect immediately prior to such
subdivision will be proportionately reduced and the number of Warrant Shares
will be proportionately increased.  If the Company at any time on or after the
Issue Date reduces or combines (by any reverse stock split, recapitalization,
reorganization, scheme, arrangement or otherwise) one or more classes of its
outstanding shares of Common Stock into a smaller number of shares, the Exercise
Price in effect immediately prior to such combination will be proportionately
increased and the number of Warrant Shares will be proportionately decreased.
Any adjustment under this Section 2(b) shall become effective at the close of
business on the date the subdivision or combination becomes effective.
     (b)     Other Events.  If any event occurs of the type contemplated by the
             ------------
provisions of this Section 2 but not expressly provided for by such provisions
(including, without limitation, the granting of stock appreciation rights,
phantom stock rights or other rights with equity features), then the Company's
Board of Directors will make an appropriate adjustment in the Exercise Price
and/or the number of Warrant Shares and other rights to be issued to the Holder
upon exercise of the Warrant so as to protect the rights of the Holder; provided
that no such adjustment pursuant to this Section 2(c) will increase the Exercise
Price or decrease the number of Warrant Shares as otherwise determined pursuant
to this Section 2.

     3.     RIGHTS UPON DISTRIBUTION OF ASSETS.  If the Company shall declare or
make any dividend or other distribution of its assets (or rights to acquire its
assets) to holders of shares of Common Stock (excluding any distribution of
equity rights for which an adjustment is made pursuant to Section 2), by way of
return of capital or otherwise (including, without limitation, any distribution
of cash, stock or other securities, property or options by way of a dividend,
spin off, reclassification, corporate rearrangement, scheme of arrangement or
other similar transaction) (a "Distribution"), at any time after the issuance of
this Warrant, then, in each such case:

     (a)     Adjustment of Exercise Price.  any Exercise Price in effect
             ----------------------------
immediately prior to the close of business on the record date fixed for the
determination of holders of shares of Common Stock entitled to receive the
Distribution shall be reduced, effective as of the close of business on such
record date, to a price determined by multiplying such Exercise Price by a
fraction of which (i) the numerator shall be the Closing Bid Price of the shares
of Common Stock on the Trading Day immediately preceding such record date minus
the value of the Distribution (as determined in good faith by the Company's
Board of Directors) applicable to one share of Common Stock, and (ii) the
denominator shall be the Closing Bid Price of the shares of Common Stock on the
Trading Day immediately preceding such record date; and

   (b)     Adjustment of Number of Warrant Shares.  The number of Warrant Shares
           --------------------------------------
shall be increased to a number of shares equal to the number of shares of Common
Stock obtainable immediately prior to the close of business on the record date
fixed for the determination of holders of shares of Common Stock entitled to
receive the Distribution multiplied by the reciprocal of the fraction set forth
in the immediately preceding paragraph (a); provided that in the event that the
Distribution is of shares of Common Stock (or common stock) ("Other Shares of
Common Stock") of a company whose common shares are traded on a national
securities exchange or a national automated quotation system, then the Holder
may elect to receive a warrant to purchase Other Shares of Common Stock in lieu
of an increase in the number of Warrant Shares, the terms of which shall be
identical to those of this Warrant, except that such warrant shall be
exercisable into the number of shares of Other Shares of Common Stock that would
have been payable to the Holder pursuant to the Distribution had the Holder
exercised this Warrant in full immediately prior to such record date and with an
aggregate exercise price equal to the product of the amount by which the
exercise price of this Warrant was decreased with respect to the Distribution
pursuant to the terms of the immediately preceding paragraph (a) and the number
of Warrant Shares calculated in accordance with the first part of this paragraph
(b).

     4.     PURCHASE RIGHTS; FUNDAMENTAL TRANSACTIONS.

(a)     Purchase Rights.  In addition to any adjustments pursuant to
        ---------------
Section 2 above, if at any time the Company grants, issues or sells any Options,
Convertible Securities or rights to purchase stock, warrants, securities or
other property pro rata to the record holders of any class of shares of Common
Stock or other securities then issuable upon exercise of this Warrant (the
"Purchase Rights"), then the Holder will be entitled to acquire, upon the terms
applicable to such Purchase Rights, the aggregate Purchase Rights which the
Holder could have acquired if the Holder had held the number of shares of Common
Stock or other securities then issuable upon exercise of this Warrant acquirable
upon complete exercise of this Warrant (without regard to any limitations on the
exercise of this Warrant) immediately before the date on which a record is taken
for the grant, issuance or sale of such Purchase Rights, or, if no such record
is taken, the date as of which the record holders of shares of Common Stock are
to be determined for the grant, issue or sale of such Purchase Rights.

(b)     Fundamental Transactions; Parent Entities.  The Company shall not enter
        -----------------------------------------
into or be party to a Fundamental Transaction unless (i) if the Successor Entity
is a publicly traded corporation whose common stock is quoted on or listed for
trading on an Eligible Market, the Successor Entity assumes in writing all of
the obligations of the Company under this Warrant pursuant to written agreements
in form and substance reasonably satisfactory to the Holder, including
agreements to deliver to each holder of Warrants in exchange for such Warrants a
written instrument issued by the Successor Entity substantially similar in form
and substance to this Warrant, including, without limitation, an adjusted
exercise price equal to the value for the shares of Common Stock reflected by
the terms of such Fundamental Transaction, and exercisable for a corresponding
number of shares of capital stock equivalent to the shares of Common Stock
acquirable and receivable upon exercise of this Warrant (without regard to any
limitations on the exercise of this Warrant) prior to such Fundamental
Transaction, and satisfactory to the Holder and (ii) if the Successor Entity is
not a publicly traded corporation whose common stock is quoted on or listed for
trading on an Eligible Market, the Successor assumes in writing all of the
obligations of the Company under this Warrant pursuant to written agreements in
form and substance reasonably satisfactory to the Holder, including agreements
to deliver to each holder of Warrants in exchange for such Warrants a written
instrument issued by the Successor Entity substantially similar in form and
substance to this Warrant exercisable for the consideration that would have been
issuable in the Fundamental Transaction in respect of the Warrant Shares had
this Warrant been exercised immediately prior to the consummation of the
Fundamental Transaction.  The provisions of this Section shall apply similarly
and equally to successive Fundamental Transactions and shall be applied without
regard to any limitations on the exercise of this Warrant.
In the event that any person becomes a Parent Entity of the Company, such person
shall assume all of the obligations of the Company under this Warrant with the
same effect as if such person had been named as the Company herein.

5.     NONCIRCUMVENTION.  The Company hereby covenants and agrees that the
Company will not, by amendment of its Certificate of Incorporation, Bylaws or
through any reorganization, transfer of assets, consolidation, merger, scheme of
arrangement, dissolution, issue or sale of securities, or any other voluntary
action, avoid or seek to avoid the observance or performance of any of the terms
of this Warrant, and will at all times in good faith carry out all the
provisions of this Warrant and take all action as may be required to protect the
rights of the Holder.  Without limiting the generality of the foregoing, the
Company, except as contemplated by Section 1(d), (i) shall not increase the par
value of any shares of Common Stock receivable upon the exercise of this Warrant
above the Exercise Price then in effect, (ii) shall take all such actions as may
be necessary or appropriate in order that the Company may validly and legally
issue fully paid and nonassessable shares of Common Stock and other securities
upon the exercise of this Warrant, and (iii) shall, so long as this Warrant is
outstanding, take all action necessary to reserve and keep available out of its
authorized and unissued shares of Common Stock and other securities, solely for
the purpose of effecting the exercise of this Warrant, 100% of the number of
shares of Common Stock and other securities issuable upon exercise of this
Warrant then outstanding (without regard to any limitations on exercise).

6.     WARRANT HOLDER NOT DEEMED A STOCKHOLDER.  Except as otherwise
specifically provided herein, the Holder, solely in such Person's capacity as a
holder of this Warrant, shall not be entitled to vote or receive dividends or be
deemed the holder of share capital of the Company for any purpose, nor shall
anything contained in this Warrant be construed to confer upon the Holder,
solely in such Person's capacity as the Holder of this Warrant, any of the
rights of a stockholder of the Company or any right to vote, give or withhold
consent to any corporate action (whether any reorganization, issue of stock,
reclassification of stock, consolidation, merger, conveyance or otherwise),
receive notice of meetings, receive dividends or subscription rights, or
otherwise, prior to the issuance to the Holder of the Warrant Shares which such
Person is then entitled to receive upon the due exercise of this Warrant.  In
addition, nothing contained in this Warrant shall be construed as imposing any
liabilities on the Holder to purchase any securities (upon exercise of this
Warrant or otherwise) or as a stockholder of the Company, whether such
liabilities are asserted by the Company or by creditors of the Company.

        7.     REISSUANCE OF WARRANTS.

(a)     Transfer of Warrant.  If this Warrant is to be transferred, the
        -------------------
Holder shall surrender this Warrant to the Company, whereupon the Company will
forthwith issue and deliver upon the order of the Holder a new Warrant (in
accordance with Section 7(d)), registered as the Holder may request,
representing the right to purchase the number of Warrant Shares being
transferred by the Holder and, if less then the total number of Warrant Shares
then underlying this Warrant is being transferred, a new Warrant (in accordance
with Section 7(d)) to the Holder representing the right to purchase the number
of Warrant Shares not being transferred.

(b)     Lost, Stolen or Mutilated Warrant.  Upon receipt by the Company of
        ---------------------------------
evidence reasonably satisfactory to the Company of the loss, theft, destruction
or mutilation of this Warrant, and, in the case of loss, theft or destruction,
of any indemnification undertaking by the Holder to the Company in customary
form and, in the case of mutilation, upon surrender and cancellation of this
Warrant, the Company shall execute and deliver to the Holder a new Warrant (in
accordance with Section 7(d)) representing the right to purchase the Warrant
Shares then underlying this Warrant.

(c)     Exchangeable for Multiple Warrants.  This Warrant is exchangeable, upon
        ----------------------------------
the surrender hereof by the Holder at the principal office of the Company, for a
new Warrant or Warrants (in accordance with Section 7(d)) representing in the
aggregate the right to purchase the number of Warrant Shares then underlying
this Warrant, and each such new Warrant will represent the right to purchase
such portion of such Warrant Shares as is designated by the Holder at the time
of such surrender; provided, however, that no Warrants for fractional shares of
Common Stock shall be given.

(d)     Issuance of New Warrants.  Whenever the Company is required to issue a
        ------------------------
new Warrant pursuant to the terms of this Warrant, such new Warrant (i) shall be
of like tenor with this Warrant, (ii) shall represent, as indicated on the face
of such new Warrant, the right to purchase the Warrant Shares then underlying
this Warrant (or in the case of a new Warrant being issued pursuant to Section
7(a) or Section 7(c), the Warrant Shares designated by the Holder which, when
added to the number of shares of Common Stock underlying the other new Warrants
issued in connection with such issuance, is equal to the number of Warrant
Shares then underlying this Warrant), (iii) shall have an issuance date, as
indicated on the face of such new Warrant, which is the same as the Issue Date,
and (iv) shall have the same rights and conditions as this Warrant.

     8.     AMENDMENT AND WAIVER.  Except as otherwise provided herein, the
provisions of this Warrant may be amended and the Company may take any action
herein prohibited, or omit to perform any act herein required to be performed by
it, only if the Company has obtained the written consent of the Holder.

     9.     GOVERNING LAW.  This Warrant shall be governed by and construed and
enforced in accordance with, and all questions concerning the construction,
validity, interpretation and performance of this Warrant shall be governed by,
the internal laws of the State of Delaware, without giving effect to any choice
of law or conflict of law provision or rule (whether of the State of Delaware or
any other jurisdictions) that would cause the application of the laws of any
jurisdictions other than the State of Delaware.

    10.  SEVERABILITY; CONSTRUCTION; HEADINGS. If one or more provisions of this
Warrant are held to be unenforceable under applicable law, such provisions shall
be excluded from this Warrant, and the balance of this Warrant shall be
interpreted as if such provision were so excluded and shall be enforceable in
accordance with its terms. This Warrant shall be deemed to be jointly drafted by
the Company and the Holder and shall not be construed against any person as the
drafter hereof. The headings of this Warrant are for convenience of reference
and shall not form part of, or affect the interpretation of, this Warrant.

    11.     NOTICES.

    (a)     Addresses.  Whenever notice is required to be given under this
             ---------
Warrant, unless otherwise provided herein, such notice shall be given in
accordance with the Stock and Warrant Purchase Agreement, or, in the case of a
Holder, to the Holder's address of record as set forth in the Company's registry
for the Warrants.

    (b)     Notices of Record Dates.  In the event of:
             -----------------------

     (i)     any taking by the Company of a record of the holders of any class
of securities for the purpose of determining the holders thereof who are
entitled to receive any dividend or other distribution (other than cash
dividends out of earned surplus), or any right to subscribe for, purchase or
otherwise acquire any shares of stock of any class or any other securities or
property, or to receive any right to sell shares of stock of any class or any
other right; or

(ii)     any capital reorganization of the Company, any reclassification or
recapitalization of the capital stock of the Company or any transfer of all or
substantially all the assets of the Company to or consolidation or merger of the
Company with or into any other corporation or entity; or

(iii)     any voluntary or involuntary dissolution, liquidation or winding-up of
the Company; or

(iv)     any public offering or any issuance by the Company of additional shares
of capital stock;
then and in each such event the Company will give notice to the Warrantholder
specifying (A) the date on which any such record is to be taken for the purpose
of such dividend, distribution or right and stating the amount and character of
such dividend, distribution or right, and (B) the date on which any such
reorganization, reclassification, recapitalization, transfer, consolidation,
merger, dissolution, liquidation or winding-up is to take place, and the time,
if any is to be fixed, as of which the holders of record of Common Stock will be
entitled to exchange their shares of Common Stock for securities or other
property deliverable upon such reorganization, reclassification,
recapitalization, transfer, consolidation, merger, dissolution, liquidation or
winding-up. Such notice shall be given at least 20 days and not more than 90
days prior to the date therein specified, and such notice shall state that the
action in question or the record date is subject to the effectiveness of a
registration statement under the Securities Act of 1933, as amended (the
"Securities Act") or to a favorable vote of stockholders, if either is required.

     (c)     Notice of Adjustments.  Upon any adjustment of the Warrant Price,
             ---------------------
then and in each such case the Company shall give written notice thereof, by
first-class mail, postage prepaid, addressed to each Warrantholder at the
address of such holder as shown on the books of the Company, which notice shall
state the Warrant Price resulting from such adjustments setting forth in
reasonable detail the method of calculation and the facts upon which such
calculation is based.

(d)     Notices of Other Actions.  The Company shall provide the Holder with
        ------------------------
prompt written notice of all other actions taken pursuant to this Warrant,
including in reasonable detail a description of such action and the reason
therefore.

     12.     REMEDIES, OTHER OBLIGATIONS, BREACHES AND INJUNCTIVE RELIEF.  The
remedies provided in this Warrant shall be cumulative and in addition to all
other remedies available under this Warrant, at law or in equity (including a
decree of specific performance and/or other injunctive relief), and nothing
herein shall limit the right of the Holder to pursue actual damages for any
failure by the Company to comply with the terms of this Warrant.

     13.     TRANSFER.  This Warrant may be offered for sale, sold, transferred
or assigned without the consent of the Company, subject to the compliance with
applicable securities laws established to the reasonable satisfaction of the
Company.

     14.     CERTAIN DEFINITIONS.  For purposes of this Warrant, the following
terms shall have the following meanings:

(a)     "Business Day" means any day other than Saturday, Sunday or other
        --------------
day on which commercial banks in The City of New York are authorized or required
by law to remain closed.

(b)     "Change of Control" means any Fundamental Transaction other than (i) any
        -------------------
reorganization, recapitalization or reclassification of the Common Stock in
which holders of the Company's voting power immediately prior to such
reorganization, recapitalization or reclassification continue after such
reorganization, recapitalization or reclassification to hold publicly traded
securities and, directly or indirectly, the voting power of the surviving entity
or entities necessary to elect a majority of the members of the board of
directors (or their equivalent if other than a corporation) of such entity or
entities, or (ii) pursuant to a migratory merger effected solely for the purpose
of changing the jurisdiction of incorporation of the Company.

(c)     "Closing Bid Price" and "Closing Sale Price" means, for any security as
        -------------------     --------------------
of any date, the last closing bid price and last closing trade price,
respectively, for such security on the Principal Market, as reported by
Bloomberg, or, if the Principal Market begins to operate on an extended hours
basis and does not designate the closing bid price or the closing trade price,
as the case may be, then the last bid price or the last trade price,
respectively, of such security prior to 4:00:00 p.m., New York time, as reported
by Bloomberg, or, if the Principal Market is not the principal securities
exchange or trading market for such security, the last closing bid price or last
trade price, respectively, of such security on the principal securities exchange
or trading market where such security is listed or traded as reported by
Bloomberg, or if the foregoing do not apply, the last closing bid price or last
trade price, respectively, of such security in the over-the-counter market on
the electronic bulletin board for such security as reported by Bloomberg, or, if
no closing bid price or last trade price, respectively, is reported for such
security by Bloomberg, the average of the bid prices, or the ask prices,
respectively, of any market makers for such security as reported in the "pink
sheets" by Pink Sheets LLC (formerly the National Quotation Bureau, Inc.).  If
the Closing Bid Price or the Closing Sale Price cannot be calculated for a
security on a particular date on any of the foregoing bases, the Closing Bid
Price or the Closing Sale Price, as the case may be, of such security on such
date shall be the fair market value as mutually determined by the Company and
the Holder.  All such determinations to be appropriately adjusted for any stock
dividend, stock split, stock combination or other similar transaction during the
applicable calculation period.

(d)     "Common Stock" means (i) the Company's shares of Common Stock par value
        --------------
$0.001 per share, and (ii) any share capital into which such Common Stock shall
have been changed or any share capital resulting from a reclassification of such
Common Stock.

(e)     "Eligible Market" means The New York Stock Exchange, Inc., The American
        -----------------
Stock Exchange, The NASDAQ Global Select Market or The NASDAQ Capital Market.

(f)     "Expiration Date" means the date sixty-six (66) months after the Issue
        -----------------
Date or, if such date falls on a day other than a Business Day or on which
trading does not take place on the Principal Market (a "Holiday"), the next date
that is not a Holiday.

(g)     "Fundamental Transaction" means that the Company shall, directly or
        -------------------------
indirectly, in one or more related transactions, (i) consolidate or merge with
or into (whether or not the Company is the surviving corporation) another
Person, or (ii) sell, assign, transfer, convey or otherwise dispose of all or
substantially all of the properties or assets of the Company to another Person,
or (iii) allow another Person to make a purchase, tender or exchange offer that
is accepted by the holders of more than the 50% of the outstanding shares of
Common Stock, or (iv) consummate a stock purchase agreement or other business
combination (including, without limitation, a reorganization, recapitalization,
spin-off or scheme of arrangement) with another Person whereby such other Person
acquires more than the 50% of the outstanding shares of Common Stock, (v)
reorganize, recapitalize or reclassify its Common Stock, or (vi) any "person" or
"group"(as these terms are used for purposes of Sections 13(d) and 14(d) of the
Exchange Act) is or shall become the "beneficial owner" (as defined in Rule
13d-3 under the Exchange Act), directly or indirectly, of 50% of the aggregate
ordinary voting power represented by issued and outstanding Common Stock.

(h)     "Options" means any rights, warrants or options to subscribe for or
        --------
purchase shares of Common Stock or securities convertible into or exercisable
for Common Stock.

(i)     "Parent Entity" of a Person means an entity that, directly or
        ---------------
indirectly, controls the applicable Person and whose common stock or equivalent
equity security is quoted or listed on an Eligible Market, or, if there is more
than one such Person or Parent Entity, the Person or Parent Entity with the
largest public market capitalization as of the date of consummation of the
Fundamental Transaction.

(j)     "Person" means an individual, a limited liability company, a
        --------
partnership, a joint venture, a corporation, a trust, an unincorporated
organization, any other entity and a government or any department or agency
thereof.

(k)     "Principal Market" means the Over the Counter Bulletin Board.
        ------------------

(l)     "Successor Entity" means the Person (or, if so elected by the Holder,
        ------------------
the Parent Entity) formed by, resulting from or surviving any Fundamental
Transaction or the Person (or, if so elected by the Holder, the Parent Entity)
with which such Fundamental Transaction shall have been entered into.

(m)     "Trading Day" means any day on which the Common Stock are traded on the
        -------------
Principal Market, or, if the Principal Market is not the principal trading
market for the Common Stock, then on the principal securities exchange or
securities market on which the Common Stock are then traded; provided that
"Trading Day" shall not include any day on which the Common Stock are scheduled
to trade on such exchange or market for less than 4.5 hours or any day that the
Common Stock are suspended from trading during the final hour of trading on such
exchange or market (or if such exchange or market does not designate in advance
the closing time of trading on such exchange or market, then during the hour
ending at 4:00:00 p.m., New York time).

IN WITNESS WHEREOF, the Company has caused this Warrant to Purchase Common Stock
to be duly executed as of the Issue Date set out above.

WORLDWATER & SOLAR TECHNOLOGIES CORP.

By:     /s/ Quentin T. Kelly
      ---------------------------------
Name:   Quentin T. Kelly
      -------------------------------
Title:  Chief Executive Officer
      -------------------------------

<PAGE>

                                    EXHIBIT A

                                 EXERCISE NOTICE
            TO BE EXECUTED BY THE REGISTERED HOLDER TO EXERCISE THIS
                        WARRANT TO PURCHASE COMMON STOCK

                      WORLDWATER & SOLAR TECHNOLOGIES CORP.

     The undersigned holder hereby exercises the right to purchase
_________________ of the shares of Common Stock ("Warrant Shares") of WorldWater
& Solar Technologies Corp., a Delaware corporation (the "Company"), evidenced by
the attached Warrant to Purchase Common Stock (the "Warrant").  Capitalized
terms used herein and not otherwise defined shall have the respective meanings
set forth in the Warrant.

     1.     Form of Exercise Price.  The Holder intends that payment of the
Exercise Price shall be made as:
     ____________ a "Cash Exercise" with respect to _________________ Warrant
Shares.

     2.     Payment of Exercise Price.  In the event that the holder has elected
a Cash Exercise with respect to some or all of the Warrant Shares to be issued
pursuant hereto, the holder shall pay the Aggregate Exercise Price in the sum of
$___________________ to the Company in accordance with the terms of the Warrant.

     3.     Delivery of Warrant Shares.  The Company shall deliver to the holder
__________ Warrant Shares in accordance with the terms of the Warrant.

Date: _______________ __, ______
By:
Name:
Title:

<PAGE>
                                     ------

                                 ACKNOWLEDGMENT

The Company hereby acknowledges this Exercise Notice and hereby directs [INSERT
NAME OF TRANSFER AGENT] to issue the above indicated number of shares of Common
Stock in accordance with the Transfer Agent Instructions dated ______, 2007 from
the Company and acknowledged and agreed to by [INSERT NAME OF TRANSFER AGENT].

WORLDWATER & SOLAR TECHNOLOGIES CORP.

By:
       --------------------------------

Name:
       --------------------------------
Title:
       --------------------------------

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