Document:

Exhibit 4.1

                                    Form of
                               Warrant to Purchase
                                    --------
                         Shares of Class A Common Stock

NEITHER THIS WARRANT NOR THE SHARES OF COMMON STOCK  ISSUABLE  UPON  EXERCISE OF
THIS WARRANT HAVE BEEN REGISTERED  UNDER THE SECURITIES ACT OF 1933, AND NEITHER
THIS WARRANT NOR SUCH SHARES MAY BE SOLD,  ENCUMBERED  OR OTHERWISE  TRANSFERRED
EXCEPT  PURSUANT TO AN  EFFECTIVE  REGISTRATION  STATEMENT  UNDER SUCH ACT OR AN
EXEMPTION  FROM SUCH  REGISTRATION  REQUIREMENT,  AND, IF AN EXEMPTION  SHALL BE
APPLICABLE,  THE HOLDER SHALL HAVE DELIVERED AN OPINION OF COUNSEL ACCEPTABLE TO
THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED.

Void after 5:00 P.M. New York City time on the last day of the Exercise  Period,
as defined in the Warrant

                                    Class A
                          COMMON STOCK PURCHASE WARRANT
                                       OF
                          WHITEWING ENVIRONMENTAL CORP.

         This is to certify that, FOR VALUE RECEIVED, ("Holder"), is entitled to
purchase,   subject  to  the   provisions  of  this  Warrant,   from   Whitewing
Environmental  Corp., a Delaware  corporation  (the  "Company"),  at an exercise
price per share of $.15,  subject to  adjustment  as provided  in this  Warrant,
thousand  ( ) shares  of  common  stock,  par value  $0.001  per share  ("Common
Stock").  The shares of Common  Stock  deliverable  upon such  exercise,  and as
adjusted from time to time, are  hereinafter  sometimes  referred to as "Warrant
Stock,"  and the  exercise  price for the  purchase  of a share of Common  Stock
pursuant to this Warrant in effect at any time and as adjusted from time to time
is hereinafter sometimes referred to as the "Exercise Price."

         1. ISSUANCE OF WARRANT.  This Warrant is being issued  pursuant to that
certain  Subscription  Agreement dated as of the date hereof between the Company
and the Holder (the "Subscription Agreement"). Capitalized terms used herein and
not  otherwise   defined  shall  have  the  meanings  ascribed  thereto  in  the
Subscription  Agreement.  In addition the following  terms have the meanings set
forth below:

                  "Closing  Price" means the last  trading  price for the Common
Stock as reported by the NASD OTC Bulletin Board, or other principal exchange or
electronic  trading  system on which the  shares of Common  Stock are  quoted or
traded.

                  "Convertible Securities" shall mean evidences of indebtedness,
shares of stock or other securities, which are convertible into or exchangeable,
with or without  payment of additional  consideration  in cash or property,  for
shares of Common Stock, either immediately or upon the occurrence of a specified
date or a specified event.

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                  "Exercise Period" shall mean the period commencing on the date
hereof  and  ending  at 5 p.m.,  eastern  time on the day  preceding  the  third
anniversary of the date hereof.

                  "Permitted  Issuances"  shall  mean (i)  Common  Stock  issued
pursuant to a stock split or  subdivision,  (ii) Common Stock issuable or issued
to employees,  consultants or directors of the Company directly or pursuant to a
stock plan or other compensation  arrangement approved by the Board of Directors
of the Company,  (iii) capital stock, debt instruments  convertible into capital
stock or options or warrants  to purchase  capital  stock,  issued to  financial
institutions,   investors  or  lessors  in  connection  with  commercial  credit
arrangements,  equipment financings or similar  transactions,  provided that the
terms of such transaction or transactions are approved by the Board of Directors
of the Company,  (iv) capital stock,  debt instruments  convertible into capital
stock or warrants or options to purchase capital stock issued in connection with
bona fide acquisitions,  mergers,  technology  licenses or purchases,  corporate
partnering  agreements,  joint  ventures or similar  transactions,  the terms of
which are approved by the Board of  Directors  of the Company,  (v) Common Stock
issued or issuable  upon  conversion  of the  Warrants  or any other  securities
exercisable  or  exchangeable  for, or  convertible  into shares of Common Stock
outstanding  as of September 10, 2003, and (vi) shares of Common Stock issued or
issuable in a transaction approved in advance by the holders of more than 50% of
the then outstanding Warrants.

                  "Redemption Conditions" means each of the following conditions
to a redemption  of the Warrants by the Company:  (i) the shares of Common Stock
have had a Closing  Price at or above $0.75 per share (as adjusted for any stock
splits,   combinations  or  other   recapitalizations)  for  not  less  than  30
consecutive  trading  days  during the 45 day period  preceding  the date of the
Redemption Notice (the "Redemption  Measuring  Period"),  (ii) the average daily
trading  volume  during the  Redemption  Measuring  Period has  exceeded  75,000
shares,  and (iii) the  resale of the  shares  of  Common  Stock  issuable  upon
exercise of the Warrants are (a)  registered  with the  Securities  and Exchange
Commission  (the  "Commission"  or the "SEC") for resale to the public  under an
effective  registration  statement,  or (b) saleable pursuant to an exemption to
the  registration  requirements  of the  Securities  Act of  1933,  as  amended,
including without limitation, Rule 144 promulgated thereunder.

                  "Trigger  Price"  shall mean $.08 per share,  as  adjusted to
reflect forward and reverse stock splits.

         2.  EXERCISE OF WARRANT.  This  Warrant may be exercised in whole or in
part at any time or from time to time from the date hereof  until the end of the
Exercise  Period by  presentation  and  surrender  hereof to the  Company at its
principal office, or at the office of its stock transfer agent, if any, with the
Purchase  Form annexed  hereto duly executed and  accompanied  by payment of the
Exercise Price for the number of shares of Common Stock  specified in such form.
If this  Warrant  should be  exercised  in part only,  the Company  shall,  upon
surrender  of this Warrant for  cancellation,  execute and deliver a new Warrant
evidencing the

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rights of the  Holder  hereof to  purchase  the  balance of the shares of Common
Stock purchasable hereunder.  Upon receipt by the Company of this Warrant at its
office,  or by the stock transfer agent of the Company at its office,  in proper
form for exercise,  the Holder shall be deemed to be the holder of record of the
shares of Common Stock  issuable upon such  exercise,  notwithstanding  that the
stock  transfer  books of the Company shall then be closed or that  certificates
representing such shares of Common Stock shall not then be actually delivered to
the Holder. As soon as practicable after each exercise of this Warrant, in whole
or in part,  and in any event within seven (7) days  thereafter,  the Company at
its expense  (including  the payment by it of any  applicable  issue taxes) will
cause to be issued in the name of and delivered to the Holder hereof or, subject
to Section 6 hereof, as the Holder (upon payment by the Holder of any applicable
transfer  taxes) may direct a  certificate  or  certificates  (with  appropriate
restrictive  legends, as applicable) for the number of duly authorized,  validly
issued,  fully paid and nonassessable shares of Common Stock to which the Holder
shall be entitled upon exercise plus, in lieu of any  fractional  share to which
the Holder would  otherwise be entitled,  all issuances of Common Stock shall be
rounded up to the nearest whole share.

         3. RESERVATION OF  SHARES/FRACTIONAL  SHARES. The Company hereby agrees
that at all times there shall be reserved  for  issuance  and/or  delivery  upon
exercise  of this  Warrant  such  number of  shares of Common  Stock as shall be
required for issuance and delivery upon exercise of this Warrant.  No fractional
shares  or  script  representing  fractional  shares  shall be  issued  upon the
exercise of this  Warrant.  Instead,  the  Company  will round up to the nearest
whole share.

         4. EXCHANGE,  TRANSFER,  ASSIGNMENT OR LOSS OF WARRANT. This Warrant is
exchangeable,  without expense,  at the option of the Holder,  upon presentation
and  surrender  hereof to the  Company  or at the  office of its stock  transfer
agent,  if any, for other  Warrants of  different  denominations  entitling  the
holder  thereof to purchase in the aggregate the same number of shares of Common
Stock purchasable hereunder. Upon surrender of this Warrant to the Company or at
the office of its stock transfer agent, if any, with the Assignment Form annexed
hereto duly  executed and funds  sufficient to pay any transfer tax, the Company
shall,  without  charge,  execute  and  deliver a new Warrant in the name of the
assignee named in such  instrument of assignment and this Warrant shall promptly
be canceled.  This Warrant may be divided or combined with other  Warrants which
carry the same rights upon  presentation  hereof at the office of the Company or
at the  office of its stock  transfer  agent,  if any,  together  with a written
notice  specifying the names and  denominations  in which new Warrants are to be
issued  and signed by the  Holder  hereof.  The term  "Warrant"  as used  herein
includes any Warrants into which this Warrant may be divided or exchanged.  Upon
receipt  by the  Company  of  evidence  satisfactory  to it of the loss,  theft,
destruction  or mutilation of this Warrant,  and (in the case of loss,  theft or
destruction) of reasonably satisfactory indemnification,  and upon surrender and
cancellation of this Warrant, if mutilated, the Company will execute and deliver
a new Warrant of like tenor.  Any such new Warrant  executed and delivered shall
constitute  an  additional  contractual  obligation  on the part of the Company,
whether or not this Warrant so lost, stolen, destroyed, or mutilated shall be at
any time enforceable by anyone.

         5.  RIGHTS AND  OBLIGATIONS  OF THE  HOLDER.  The Holder  shall not, by
virtue of this  Warrant,  be  entitled  to any  rights of a  stockholder  in the
Company,  either at law or

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equity,  and the  rights of the Holder are  limited  to those  expressed  in the
Warrant and are not  enforceable  against  the Company  except to the extent set
forth herein.  In addition,  no provision  hereof, in the absence of affirmative
action by Holder to purchase shares of Common Stock,  and no enumeration  herein
of the rights or privileges of Holder  hereof,  shall give rise to any liability
of such Holder for the purchase price of any Common Stock or as a stockholder of
Company,  whether  such  liability  is  asserted by Company or by  creditors  of
Company.

         6. ANTI-DILUTION  PROVISIONS.  The Exercise Price in effect at any time
and the number and kind of securities  purchasable upon exercise of each Warrant
shall be subject to adjustment as follows and the Company shall give each Holder
notice of any event  described  below which  requires an adjustment  pursuant to
this Section 7 at the time of such event:

              (a) Stock Dividends, Subdivisions and Combinations. If at any time
Company shall:

                    (i) take a record of the holders of its Common Stock for the
purpose  of  entitling  them  to  receive  a  dividend   payable  in,  or  other
distribution of, shares of Common Stock,

                    (ii)  subdivide  or  reclassify  its  outstanding  shares of
Common Stock into a larger number of shares of Common Stock, or

                    (iii) combine or reclassify its outstanding shares of Common
Stock  into a smaller  number of shares of Common  Stock or  otherwise  effect a
reverse stock split,

then (i) the  number  of  shares of Common  Stock  for  which  this  Warrant  is
exercisable immediately after the occurrence of any such event shall be adjusted
to equal the number of shares of Common Stock which a record  holder of the same
number of  shares  of  Common  Stock  for  which  this  Warrant  is  exercisable
immediately  prior to the occurrence of such event, or the record date therefor,
whichever is earlier, would own or be entitled to receive after the happening of
such event,  and (ii) the Exercise  Price(s)  shall be adjusted to equal (A) the
Exercise  Price  immediately  prior to such  event  multiplied  by the number of
shares of Common Stock for which this Warrant is exercisable  immediately  prior
to the adjustment  divided by (B) the number of shares for which this Warrant is
exercisable immediately after such adjustment.

              (b) Certain Other Distributions and Adjustments.

                    (i) If at any  time  Company  shall  take  a  record  of the
holders of its Common  Stock for the  purpose of  entitling  them to receive any
dividend or other distribution of:

                         (A) cash,

                         (B) any  evidences of its  indebtedness,  any shares of
its stock or any other  securities or property of any nature  whatsoever  (other
than Convertible Securities or shares of Common Stock), or

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                         (C) any warrants or other  rights to  subscribe  for or
purchase any evidences of its indebtedness, any shares of its stock or any other
securities  or  property  of  any  nature  whatsoever  (other  than  Convertible
Securities or shares of Common Stock),

then Holder shall be entitled to receive  such  dividend or  distribution  as if
Holder had exercised this Warrant.  (ii) A reclassification  of the Common Stock
(other than a change in par value,  or from par value to no par value or from no
par value to par  value)  into  shares of Common  Stock and  shares of any other
class of stock shall be deemed a  distribution  by Company to the holders of its
Common  Stock of such  shares of such  other  class of stock  and in such  event
Holder shall be entitled to receive such distribution as if Holder had exercised
this  Warrant  and, if the  outstanding  shares of Common Stock shall be changed
into a larger or  smaller  number  of  shares of Common  Stock as a part of such
reclassification,  such change shall be deemed a subdivision or combination,  as
the case may be, of the outstanding shares of Common Stock within the meaning of
Section 6(a).

         (c) Issuance of Additional Shares of Common Stock.

              (i) If at any time the  Company  shall issue or sell any shares of
Common  Stock in  exchange  for  consideration  in an amount per share of Common
Stock less than the Trigger Price, other than Permitted Issuances,  then (A) the
Exercise Price shall be adjusted so that it shall equal the price  determined by
multiplying  the Exercise Price in effect  immediately  prior to such event by a
fraction,  of which the numerator  shall be the number of shares of Common Stock
outstanding  on the date of  issuance  plus the number of  additional  shares of
Common Stock which the aggregate  offering  price would  purchase based upon the
Closing  Price,  and of which the  denominator  shall be the number of shares of
Common Stock  outstanding  on the date of issuance plus the number of additional
shares of Common Stock issued or issuable in such  offering,  and (B) the number
of shares  of  Common  Stock for which  this  Warrant  is  exercisable  shall be
adjusted to equal the product  obtained by  multiplying  the  Exercise  Price in
effect immediately prior to such issue or sale by the number of shares of Common
Stock for which this Warrant is exercisable  immediately  prior to such issue or
sale and dividing the product  thereof by the Exercise Price  resulting from the
adjustment made pursuant to clause (A) above.

              (ii) The  provisions  of paragraph  (i) of this Section 6(c) shall
not apply to any issuance of shares of Common Stock for which an  adjustment  is
provided  under  Section 6(a) or 6(b).  No adjustment of the number of shares of
Common Stock for which this  Warrant  shall be  exercisable  shall be made under
paragraph  (i) of this  Section  6(c) upon the  issuance of any shares of Common
Stock  which are  issued  pursuant  to the  exercise  of any  warrants  or other
subscription or purchase rights or pursuant to the exercise of any conversion or
exchange rights in any  Convertible  Securities,  if any such  adjustment  shall
previously  have been made upon the issuance of such warrants or other rights or
upon the issuance of such  Convertible  Securities  (or upon the issuance of any
warrant or other rights therefor)  pursuant to Section 6(d) or Section 6(e).

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         (d) Issuance of Warrants or Other Rights.  If at any time Company shall
take a record of the holders of its Common  Stock for the  purpose of  entitling
them to receive a distribution  of, or shall in any manner (whether  directly or
by assumption in a merger in which Company is the surviving  corporation)  issue
or sell, any warrants or other rights to subscribe for or purchase any shares of
Common  Stock  or any  Convertible  Securities,  whether  or not the  rights  to
exchange or convert  thereunder are immediately  exercisable,  and the price per
share for which Common Stock is issuable  upon the exercise of such  warrants or
other rights or upon conversion or exchange of such Convertible Securities shall
be less than the Trigger Price, then the number of shares for which this Warrant
is  exercisable  and the Exercise Price shall be adjusted as provided in Section
6(c) on the basis that the  maximum  number of shares of Common  Stock  issuable
pursuant  to all such  warrants  or other  rights or  necessary  to  effect  the
conversion  or exchange of all such  Convertible  Securities  shall be deemed to
have been issued and  outstanding  and Company  shall be deemed to have received
all the consideration  payable  therefor,  if any, as of the date of issuance of
such warrants or other rights.  No further  adjustment of the Exercise  Price(s)
shall be made upon the actual issue of such Common Stock or of such  Convertible
Securities  upon  exercise of such  warrants or other  rights or upon the actual
issuance  of  such  Common  Stock  upon  such  conversion  or  exchange  of such
Convertible Securities.

         (e) Issuance of  Convertible  Securities.  If at any time Company shall
take a record of the holders of its Common  Stock for the  purpose of  entitling
them to receive a distribution  of, or shall in any manner (whether  directly or
by assumption in a merger in which Company is the surviving  corporation)  issue
or sell, any  Convertible  Securities,  whether or not the rights to exchange or
convert  thereunder  are  immediately  exercisable,  and the price per share for
which Common Stock is issuable upon such  conversion  or exchange  shall be less
than the Trigger Price, then the number of shares of Common Stock for which this
Warrant is  exercisable  and the Exercise Price shall be adjusted as provided in
Section  6(c) on the basis  that the  maximum  number of shares of Common  Stock
necessary  to  effect  the  conversion  or  exchange  of  all  such  Convertible
Securities shall be deemed to have been issued and outstanding and Company shall
have received all of the consideration  payable therefor, if any, as of the date
of issuance of such Convertible Securities.  If any issue or sale of Convertible
Securities  is made upon exercise of any warrant or other right to subscribe for
or to purchase any such  Convertible  Securities  for which  adjustments  of the
number of shares of Common Stock for which this Warrant is  exercisable  and the
Exercise  Price have been or are to be made pursuant to Section 6(d), no further
adjustment  of the number of shares of Common  Stock for which  this  Warrant is
exercisable and the Exercise Price shall be made by reason of such record, issue
or sale.

         (f) Superseding Adjustment.  If at any time after any adjustment of the
number of shares of Common Stock for which this Warrant is  exercisable  and the
Exercise  Price(s) shall have been made pursuant to Section 6(d) or Section 6(e)
as the result of any issuance of warrants, rights or Convertible Securities,

              (i)  such  warrants  or  rights,  or the  right of  conversion  or
exchange  in such  other  Convertible  Securities,  shall  expire,  and all or a
portion of such warrants or rights,  or the right of conversion or exchange with
respect to all or a portion of such other  Convertible  Securities,  as the case
may be, shall not have been exercised, or

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              (ii) the  consideration per share for which shares of Common Stock
are  issuable  pursuant to such  warrants or rights,  or the terms of such other
Convertible  Securities,  shall be  increased  solely by  virtue  of  provisions
therein contained for an automatic increase in such consideration per share upon
the occurrence of a specified date or event,

then for each  outstanding  Warrant such previous  adjustment shall be rescinded
and  annulled  and the shares of Common  Stock  which  were  deemed to have been
issued by virtue of the  computation  made in connection  with the adjustment so
rescinded  and annulled  shall no longer be deemed to have been issued by virtue
of such  computation  made in  connection  with the  adjustment so rescinded and
annulled  shall no  longer  be  deemed  to have  been  issued  by virtue of such
computation.  Thereupon,  a  recomputation  shall be made of the  effect of such
rights or options or other Convertible Securities on the basis of:

                    (A)  treating  the number of shares of Common Stock or other
property,  if any,  theretofore  actually  issued or  issuable  pursuant  to the
previous exercise of any such warrants or rights or any such right of conversion
or exchange, as having been issued on the date or dates of any such exercise and
for the consideration actually received and receivable therefor, and

                    (B) treating  any such  warrants or rights or any such other
Convertible  Securities which then remain  outstanding as having been granted or
issued  immediately  after the time of such  increase of the  consideration  per
share for which shares of Common Stock or other property are issuable under such
warrants or rights or other convertible  Securities;  whereupon a new adjustment
of the number of shares of Common  Stock for which this  Warrant is  exercisable
and the Exercise  Price(s) shall be made,  which new adjustment  shall supersede
the previous adjustment so rescinded and annulled.

         (g) No adjustment in the Exercise  Price shall be required  unless such
adjustment would require an increase or decrease of at least one cent ($0.01) in
such price;  provided,  however,  that any  adjustments  which by reason of this
Section 6(g) are not required to be made shall be carried forward and taken into
account in any subsequent  adjustment.  All calculations under this Section 6(g)
shall be made to the nearest cent or to the nearest one-hundredth of a share, as
the case may be.

         (h) The Company may retain a firm of independent  public accountants of
recognized  standing  selected by the Board (who may be the regular  accountants
employed by the Company) to make any computation required by this Section 6.

         (i) In the event that at any time,  as a result of an  adjustment  made
pursuant to Section 6(a), (b) or (c) of this Warrant,  the Holder of any Warrant
thereafter  shall become  entitled to receive any shares of the  Company,  other
than Common Stock, thereafter the number of such other shares so receivable upon
exercise of any Warrant  shall be subject to  adjustment  from time to time in a
manner and on terms as nearly  equivalent as practicable to the provisions  with
respect to the Common Stock  contained in Sections 6(a) through (h),  inclusive,
of this Warrant.

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         (j) Notwithstanding the foregoing,  no adjustment shall be effected due
to, or as a result of, any Permitted Issuances.

         (k) Other Action  Affecting  Common Stock.  In case at any time or from
time to time Company shall take any action in respect of its Common Stock, other
than any action  described in this Section 6, then,  unless such action will not
have a materially  adverse effect upon the rights of the Holders,  the number of
shares of Common  Stock or other  stock for which this  Warrant  is  exercisable
and/or the  purchase  price  thereof  shall be adjusted in such manner as may be
equitable in the circumstances.

      7. REDEMPTION.

         (a)  Redemption  Option.   Upon  the  satisfaction  of  the  Redemption
Conditions, the Company may, at the option of its Board of Directors, redeem the
Warrants, out of funds legally available therefor by paying the Redemption Price
(as hereafter defined) in cash for each Warrant then redeemed.

         (b) Redemption  Price.  The Redemption Price under this Section 7 shall
be $.08 per Warrant,  subject to adjustment for any stock split, stock dividend,
recapitalization, combination or adjustment.

         (c) Notice.  Notice of any proposed redemption of the Warrants pursuant
to this  Section 7 shall be given by the Company by sending by  certified  mail,
postage  prepaid,  a copy of such notice (the  "Redemption  Notice") at least 30
days prior to date on which it  proposes  to redeem  the stock (the  "Redemption
Date") to the holders of record of the Warrants,  at their respective  addresses
appearing on the books of the Company or given by such holder to the Company for
the  purposes  of notice,  or if no such  address  appears  or is given,  at the
principal office of the Company.  Such notice shall state the Redemption Date to
which such  notice  relates,  the number of  Warrants  to be  redeemed  from all
holders  thereof and from such holder,  the  Redemption  Price per Warrant,  the
record date for purposes of such  redemption and the date on which such holder's
right to exercise the Warrant into Common Stock will  terminate,  and shall call
upon such  holder to  surrender  to the Company on said  Redemption  Date at the
place  designated  in the  notice  such  holder's  certificate  or  certificates
representing the Warrants to be redeemed.

         (d)  Payment.  On the  Redemption  Date,  the funds  legally  available
therefor  shall be used to redeem  from the  holders  thereof at the  Redemption
Price that  number of  Warrants  which the Company has elected to redeem on such
date.

         (e) Redemption  Procedures.  On or after a Redemption Date, each holder
of Warrants  being  redeemed on that date shall  surrender  this  Warrant to the
Company, or its agent, at the place designated in the notice and shall thereupon
be entitled to receive payment of the Redemption Price therefor.  The Redemption
Price of such  Warrants  shall be payable to the order of the person  whose name
appears on this Warrant as the owner thereof, and each surrendered Warrant shall
be cancelled.

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         (f) Deposit of  Redemption  Price.  Within ten (10) days  following the
Redemption  Date,  the Company  shall pay the  Redemption  Price of all Warrants
designated  for  redemption in the  Redemption  Notice and not yet exercised for
shares of Common Stock to the Warrant holder.

         (g)  Termination of Rights.  From and after the  Redemption  Date then,
notwithstanding  that the Warrants so called for redemption  shall not have been
surrendered,  all rights of the holders  thereof with respect to the Warrants so
called for  redemption  shall  forthwith  after  such date cease and  terminate,
except  only the right of the  holders  to  receive  the  Redemption  Price upon
surrender of their Warrant therefor.

      8. OFFICER'S CERTIFICATE. Whenever the Exercise Price(s) shall be adjusted
as required by the  provisions of Section 6 of this  Warrant,  the Company shall
forthwith file in the custody of its Secretary or an Assistant  Secretary at its
principal  office  and with its  stock  transfer  agent,  if any,  an  officer's
certificate  showing the adjusted  Exercise  Price(s) and the adjusted number of
shares of Common Stock  issuable upon  exercise of each  Warrant,  determined as
herein  provided,  setting forth in reasonable  detail the facts  requiring such
adjustment,  including a statement of the number of additional  shares of Common
Stock, if any, and such other facts as shall be necessary to show the reason for
and the manner of computing such  adjustment.  Each such  officer's  certificate
shall be forwarded to Holder as provided in Section 12.

      9  NOTICES  TO  WARRANT  HOLDERS.   So  long  as  this  Warrant  shall  be
outstanding,  (1) if the Company shall pay any dividend or make any distribution
upon Common  Stock,  or (2) if the Company  shall offer to the holders of Common
Stock for  subscription  or purchase by them any share of any class or any other
rights, or (3) if any capital reorganization of the Company, reclassification of
the capital stock of the Company, consolidation or merger of the Company with or
into another entity,  tender offer  transaction for the Company's  Common Stock,
sale, lease or transfer of all or  substantially  all of the property and assets
of the Company, or voluntary or involuntary dissolution,  liquidation or winding
up of the  Company  shall  be  effected,  or (4) if  the  Company  shall  file a
registration statement under the Securities Act of 1933, as amended (the "Act"),
on any form other  than on Form S-4 or S-8 or any  successor  form,  then in any
such case, the Company shall cause to be mailed by certified mail to the Holder,
at least ten days prior to the date  specified in clauses (1),  (2), (3) or (4),
as the case may be, of this Section 9 a notice containing a brief description of
the  proposed  action and  stating the date on which (i) a record is to be taken
for  the  purpose  of such  dividend,  distribution  or  rights,  or  (ii)  such
reclassification,    reorganization,   consolidation,   merger,   tender   offer
transaction,  conveyance,  lease,  dissolution,  liquidation or winding up is to
take  place and the  date,  if any is to be fixed,  as of which the  holders  of
Common  Stock  or  other   securities  shall  receive  cash  or  other  property
deliverable upon such reclassification,  reorganization,  consolidation, merger,
conveyance,  dissolution,  liquidation or winding up, or (iii) such registration
statement is to be filed with the Securities and Exchange Commission.

      10.   RECLASSIFICATION,   REORGANIZATION   OR  MERGER.   In  case  of  any
reclassification,  capital  reorganization or other change of outstanding shares
of Common Stock of the Company, or in case of any consolidation or merger of the
Company with or into another  corporation (other than a merger with a subsidiary
in which merger the Company is the

                                       9
<PAGE>

continuing  or  surviving   corporation   and  which  does  not  result  in  any
reclassification,  capital  reorganization or other change of outstanding shares
of Common Stock of the class  issuable upon exercise of this Warrant) or in case
of any sale,  lease or conveyance of all or  substantially  all of the assets of
the Company,  the Company shall, as a condition  precedent to such  transaction,
cause  effective  provisions  to be made so that (i) the  Holder  shall have the
right thereafter by exercising this Warrant,  to purchase the kind and amount of
shares  of  stock  and  other  securities  and  property  receivable  upon  such
reclassification,   capital  reorganization  and  other  change,  consolidation,
merger,  sale or  conveyance by a holder of the number of shares of Common Stock
which could have been purchased upon exercise of this Warrant  immediately prior
to such reclassification, change, consolidation, merger, sale or conveyance, and
(ii) the  successor  or  acquiring  entity  shall  expressly  assume the due and
punctual  observance  and  performance  of each  covenant and  condition of this
Warrant  to be  performed  and  observed  by  Company  and all  obligations  and
liabilities  hereunder (including but not limited to the provisions of Section 3
regarding  the  increase  in the number of shares of Warrant  Stock  potentially
issuable hereunder).  Any such provision shall include provision for adjustments
which shall be as nearly equivalent as possible to the adjustments  provided for
in this  Warrant.  The foregoing  provisions of this Section 10 shall  similarly
apply to successive  reclassifications,  capital  reorganizations and changes of
shares  of Common  Stock and to  successive  consolidations,  mergers,  sales or
conveyances.   In  the  event  that  in   connection   with  any  such   capital
reorganization or reclassification,  consolidation,  merger, sale or conveyance,
additional  shares of Common  Stock  shall be  issued in  exchange,  conversion,
substitution  or payment,  in whole in part, for a security of the Company other
than  Common  Stock,  any such issue  shall be treated as an  issuance of Common
Stock covered by the provisions of Section 6 of this Warrant.

      11.  TRANSFER TO COMPLY WITH THE SECURITIES  ACT OF 1933.  This Warrant or
the Warrant Stock or any other security issued or issuable upon exercise of this
Warrant may not be sold or otherwise disposed of except as follows:

              (i) to a person who, in the opinion of counsel for the Company, is
a person to whom this  Warrant  or  Warrant  Stock may  legally  be  transferred
without  registration and without the delivery of a current prospectus under the
Act with respect  thereto and then only against  receipt of an agreement of such
person to comply  with the  provisions  of this  Section 11 with  respect to any
resale  or  other  disposition  of such  securities  which  agreement  shall  be
satisfactory in form and substance to the Company and its counsel; or

              (ii) to any person upon delivery of a prospectus  then meeting the
requirements of the Act relating to such securities and the offering thereof for
such sale or disposition.

      12.  GOVERNING  LAW;  JURISDICTION.  The  corporate  laws of the  State of
Delaware shall govern all issues  concerning the relative  rights of the Company
and  its  stockholders.  All  issues  concerning  the  construction,   validity,
enforcement  and  interpretation  of  this  Warrant  shall  be  governed  by and
construed in accordance  with the internal laws of the State of New York without
giving effect to the principles of conflicts of law thereof.  The parties hereto
agree that venue in any and all actions and  proceedings  related to the subject
matter of this Warrant  shall be in the state and federal  courts in and for New
York, New York, which courts shall have exclusive jurisdiction for such purpose,
and the parties hereto irrevocably submit to

                                       10
<PAGE>

the exclusive  jurisdiction of such courts and irrevocably  waive the defense of
an  inconvenient  forum to the  maintenance  of any such  action or  proceeding.
Service of process may be made in any manner  recognized  by such  courts.  This
Warrant and any term hereof may be changed,  waived,  discharged  or  terminated
only by an instrument in writing  signed by the party against which  enforcement
of the change, waiver, discharge or termination is sought.

      13.  NOTICES.  Any and all notices or other  communications  or deliveries
required or permitted to be provided  hereunder shall be in writing and shall be
deemed given and effective on the earliest of (i) the date of  transmission,  if
such  notice or  communication  is  delivered  via  facsimile  at the  facsimile
telephone  number  specified in this Section  prior to 6:30 p.m.  (New York City
time) on a Business Day,  (ii) the Business Day after the date of  transmission,
if such notice or  communication  is delivered  via  facsimile at the  facsimile
telephone number specified in this Agreement later than 6:30 p.m. (New York City
time) on any date and earlier than 11:59 p.m. (New York City time) on such date,
(iii) the  Business Day  following  the date of mailing,  if sent by  nationally
recognized  overnight courier service,  or (iv) upon actual receipt by the party
to whom such notice is required  to be given.  The address for such  notices and
communications shall be as follows:

           If to the Company:   Whitewing Environmental Corp.
                                730 Grand Avenue
                                Ridgefield, NJ  07657
                                Facsimile No.: (201) 943-2023
                                Attn:  Norman Raben

           With copies to:      Brown Rudnick Berlack Israels LLP
                                120 West 45th Street
                                New York, New York 10036
                                Facsimile No.: (212) 704-0196
                                Attn: Alan Forman, Esq.

           If to the Holder     To the Address Set Forth Below

           With copies to:      Maxim Group, LLC
                                405 Lexington Avenue, 2nd Floor
                                New York, NY 10017
                                Facsimile No.: (212) 895-2555
                                Attn:  Anthony Sarkis

      14.  PAYMENT OF TAXES.  The Company will pay all  documentary  stamp taxes
attributable  to the issuance of shares of Common Stock  underlying this Warrant
upon exercise of this Warrant; provided,  however, that the Company shall not be
required to pay any tax which may be payable in respect of any transfer involved
in the  registration of any  certificate  for shares of Common Stock  underlying
this Warrant in a name other that of the Holder.  The Holder is responsible  for
all other tax  liability  that may arise as a result of holding or  transferring
this Warrant or receiving  shares of Common Stock  underlying  this Warrant upon
exercise hereof.

                                       11
<PAGE>

         IN WITNESS WHEREOF, this Warrant has been duly executed as of September
20, 2003.

                           WHITEWING ENVIRONMENTAL CORP.

                           By: ________________________________
                               Name:  Norman Raben
                               Address:  Executive Vice President and Secretary

                                       12
<PAGE>

                                  PURCHASE FORM

                         Dated: _______________, 20_____

         The  undersigned  hereby  irrevocably  elects to  exercise  the  within
Warrant  to the extent of  purchasing  _____  shares of Common  Stock and hereby
makes  payment of (i)  $___________  in payment  of the  actual  exercise  price
thereof  and/or (ii) the  surrender to the Company of _______  shares of Warrant
Stock.  Schedule 1 attached  hereto  specifies  the Warrant Stock from which the
shares of Common Stock are being  purchased  and the Exercise  Price(s) for such
shares.

                     --------------------------------------

<PAGE>

                     INSTRUCTIONS FOR REGISTRATION OF STOCK

Name:___________________________________________
     (Please typewrite or print in block letters)

Signature:________________________________________

Social Security or Employer Identification No.:_________________________

<PAGE>

                                 ASSIGNMENT FORM

         FOR  VALUE  RECEIVED,   _______________________________________  hereby
sells, assigns and transfer unto:

Name:_______________________________________________
     (Please typewrite or print in block letters)

Address:_____________________________________________

Social Security or Employer Identification No.:__________________________

The right to purchase Common Stock  represented by this Warrant to the extent of
shares  as to which  such  right is  exercisable  and  does  hereby  irrevocably
constitute and appoint attorney to transfer the same on the books of the Company
with full power of substitution.

         Dated: _________________, 200_.

                                Signature:________________________________

Signature Guaranteed:

-----------------------------------Exhibit 4.2

THIS OPTION AND ANY SHARES  ACQUIRED  UPON THE  EXERCISE OF THIS OPTION HAVE NOT
BEEN  REGISTERED  UNDER THE SECURITIES  ACT OF 1933, AS AMENDED,  AND MAY NOT BE
TRANSFERRED,  SOLD OR  OTHERWISE  DISPOSED OF EXCEPT  PURSUANT  TO AN  EFFECTIVE
REGISTRATION  STATEMENT UNDER SAID ACT OR AN OPINION OF COUNSEL  SATISFACTORY TO
THE COMPANY THAT REGISTRATION IS NOT REQUIRED UNDER SAID ACT.

                          WHITEWING ENVIRONMENTAL CORP.

                                    FORM OF
                      PLACEMENT AGENT UNITS PURCHASE OPTION

                               September 30, 2003

         This PLACEMENT  AGENT UNITS PURCAHSE OPTION (the "Option") of Whitewing
Environmental Corp., a corporation duly organized and validly existing under the
laws of the State of Delaware  (the  "Company"),  is being issued  pursuant to a
private  offering  (the  "Offering")  of up to  250,000  units  ("Units")  at an
offering price of $8.00 per Unit,  each Unit  consisting of one (1) share of the
Company's  Series A  Convertible  Preferred  Stock,  par  value  $.001 per share
("Series  A Stock")  and  forty  (40)  Class A Common  Stock  Purchase  Warrants
("Warrants");

         FOR VALUE RECEIVED,  the Company hereby certifies that Maxim Group, LLC
("Maxim") and its  successors and assigns (the "Holder") is entitled to purchase
from the Company up to _______________ (_________)Units, at a purchase price per
Unit equal to $10.00 (the "Unit  Price"),  subject to the terms,  conditions and
adjustments set forth below in this Option.

         1.  Vesting of Option.  This Option  shall vest and become  exercisable
immediately upon issuance.

         2. Expiration of Option. This Option shall expire on September 30, 2008
(the "Expiration Date").

         3. Exercise of Option. This Option shall be exercisable pursuant to the
terms of Section 3 hereof.

                  3.1 Manner of  Exercise.  This Option may only be exercised by
the Holder hereof, in accordance with the terms and conditions  hereof, in whole
or in part with  respect to any portion of the Option,  during  normal  business
hours on any day other than a Saturday or a Sunday or a day on which  commercial
banking institutions in New York, New York are authorized by law to be closed (a
"Business  Day") on or prior to the Expiration Date with respect to such portion
of the  Option,  by  surrender  of this  Option  to the  Company  at its  office
maintained pursuant to Section 11.2(a) hereof, accompanied by an exercise notice
in substantially  the form attached as Exhibit A to this Option (or a reasonable
facsimile thereof) duly executed by the Holder, together with the payment of the
Unit Price.  The Option must be

<PAGE>

accompanied  by  payment  in full of the Unit  Price in cash or by check for the
amount of Units being  purchased.  The Unit Price may also be paid in full or in
part at the  election of the Holder:  (i) in the form of Series A Stock owned by
the Holder  (based on the Fair Market Value (as defined  below) of the shares of
common stock,  par value $.001,  of the Company (the "Common  Stock") into which
such  shares of Series A Stock are  convertible  on the  trading  day before the
Option is  exercised),  (ii) in the form of shares of Series A Stock withheld by
the Company  from the shares of Series A Stock  otherwise  to be  received  upon
exercise of this Option  having a Fair Market Value (based on the shares  Common
Stock into which such shares of Series A Stock are  convertible)  on the date of
exercise equal to the Unit Price of the Option, or (iii) by a combination of the
foregoing, provided that the combined value of all cash and cash equivalents and
the Fair Market Value of any shares surrendered to the Company is at least equal
to such Unit Price.

                  For  purposes of this  Option,  the term "Fair  Market  Value"
means the closing  price of publicly  traded  shares of the Common  Stock on the
principal securities exchange on which shares of Common Stock are listed (if the
shares of Common Stock are so listed),  or as  determined  by the Holder and the
Company in a fair manner.

                  Alternatively,  the Unit  Price may be paid  through a special
sale and remittance  procedure  pursuant to which the Holder shall  concurrently
provide irrevocable instructions:  (i) to a Company-designated brokerage firm to
effect the immediate  sale of the purchased  shares and to remit to the Company,
out of the sale proceeds  available on the settlement date,  sufficient funds to
cover the aggregate  Unit Price payable for the  purchased  securities  plus all
applicable Federal,  state and local income taxes required to be withheld by the
Company by reason of such  exercise,  if any, and (ii) to the Company to deliver
the certificates for the purchased securities directly to such brokerage firm in
order to complete the sale.

                  3.2 When  Exercise  Effective.  Each  exercise  of this Option
shall be deemed to have been effected immediately prior to the close of business
on the  Business  Day on which this Option  shall have been  surrendered  to the
Company as provided in Section 3.1 hereof,  and, at such time, the  corporation,
association,  partnership,  organization,  business,  individual,  government or
political  subdivision  thereof  or a  governmental  agency (a  "Person"  or the
"Persons") in whose name or names any certificate or certificates  for shares of
Series A Stock and  Warrants  shall be  issuable  upon  exercise  as provided in
Section  3.3  hereof  shall be deemed to have  become  the  holder or holders of
record thereof.

                  3.3 Delivery of Series A Stock  Certificates and Warrants.  As
soon as practicable after each exercise of this Option, in whole or in part, and
in any event  within  three (3)  Business  Days  thereafter,  the Company at its
expense  (including the payment by it of any applicable  issue taxes) will cause
to be issued in the name of and  delivered to the Holder  hereof or,  subject to
Section 10 hereof,  as the Holder (upon payment by the Holder of any  applicable
transfer taxes) may direct:

                           (a) a certificate or certificates  (with  appropriate
restrictive  legends, as applicable) for the number of duly authorized,  validly
issued,  fully paid and  nonassessable  shares of Series A Stock and Warrants to
which the Holder shall be entitled upon exercise plus, in lieu

                                       2
<PAGE>

of any  fractional  share to which the Holder would  otherwise be entitled,  all
issuances of Series A Stock shall be rounded up to the nearest whole share;  and
for the  number of  Warrants  to which  the  Holder is  entitled  upon  exercise
thereof.

                           (b) in case exercise is in part only, a new Option of
like  tenor,  dated the date  hereof and  calling in the  aggregate  on the face
thereof for the number of Units on the face of this  Option  minus the number of
Units  designated  by the Holder upon exercise as provided in Section 3.1 hereof
(without giving effect to any adjustment thereof).

                  3.4 Company to Reaffirm Obligations.  The Company will, at the
time of each  exercise of this  Option,  upon the written  request of the Holder
hereof, acknowledge in writing its continuing obligation to afford to the Holder
all rights  (including  without  limitation  any rights to  registration  of the
shares of Series A Stock issuable or issued upon exercise of this Option and the
Warrants  contained  therein) to which the Holder shall  continue to be entitled
after exercise in accordance with the terms of this Option;  provided,  however,
that if the Holder  shall fail to make a request,  the failure  shall not affect
the continuing obligation of the Company to afford the rights to such Holder.

         4.  Adjustment of Series A Stock and Warrants  Issuable Upon  Exercise.
The  number  shares of Common  Stock into which the shares of Series A Stock are
convertible  and which are issuable  upon the exercise of the Warrants  shall be
subject to be adjusted  and  re-adjusted  from time to time as provided  for in,
respectively,  the  certificate  of  designations  of the Series A Stock and the
Warrant Certificate, each of which is attached as an exhibit to the confidential
private  offering  memorandum  of the  Company,  dated  September  10, 2003 (the
"PPM"), which PPM describes the Offering.

         5.   Adjustments  for   Consolidation,   Merger,   Sale  of  Assets  or
Reorganization. In case the Company after the date hereof: (a) shall consolidate
with or merge into any other Person and shall not be the continuing or surviving
corporation following the consolidation or merger, or (b) shall permit any other
Person to  consolidate  with or merge into the Company and the Company  shall be
the continuing or surviving Person but, in connection with the  consolidation or
merger,  the Common Stock shall be changed into or exchanged  for stock or other
securities  of any  other  Person or cash or any  other  property,  or (c) shall
transfer  all or  substantially  all of its  properties  or  assets to any other
Person, or (d) shall effect a capital  reorganization or reclassification of the
Common Stock,  then, and in the case of each such transaction,  proper provision
shall be made so that,  upon the basis and the terms and in the manner  provided
in this  Option,  the  Holder,  upon the  exercise  hereof at any time after the
consummation of the transaction,  shall be entitled to receive (at the aggregate
Unit Price in effect at the time of such  consummation  for all Common Stock and
Warrants issuable upon exercise immediately prior to the consummation),  in lieu
of the  Series  A  Stock  and  Warrants  issuable  upon  exercise  prior  to the
consummation, the greatest amount of securities, cash or other property to which
the Holder would actually have been entitled as a common  stockholder  upon such
consummation  if the Holder had exercised the rights  represented by this Option
and the securities thereunder immediately prior thereto,  subject to adjustments
(subsequent  to the  consummation)  as  nearly  equivalent  as  possible  to the
adjustments provided for in Sections 4 hereof.

                                       3
<PAGE>

         6. No Dilution or Impairment.

                  6.1 The Company will not, by amendment of its  certificate  of
incorporation or through any consolidation, merger, reorganization,  transfer of
assets, 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
Option, but will at all times in good faith assist in the carrying out of all of
the terms and in the taking of all actions  necessary or appropriate in order to
protect  the  rights of the  Holder.  Without  limiting  the  generality  of the
foregoing,  the  Company:  (a) will not  permit  the par value of any  shares of
Series A Stock  receivable  upon the  exercise  of this Option (or the shares of
Common Stock  thereunder) to exceed the amount  payable  therefor upon exercise,
(b) will take all actions necessary or appropriate in order that the Company may
validly and legally issue fully paid and nonassessable  shares of Series A Stock
(or the shares of Common Stock thereunder) on the exercise of the Option and (c)
will not take any action which  results in any  adjustment  of the Unit Price if
the total  number of  shares  of Series A Stock (or the  shares of Common  Stock
thereunder)  issuable  after the action upon the  exercise  of the Option  would
exceed  the total  number of  shares  of  Series A Stock or  Common  Stock  then
authorized by the Company's  certificate of incorporation  and available for the
purpose of issuance upon exercise.

                  6.2 The  number  of shares  of  Series A Stock  issuable  upon
exercise of the Option may increase substantially in certain circumstances.  The
Company  acknowledges  that its obligation to issue shares of Series A Stock (or
the shares of Common Stock  thereunder)  issuable upon exercise of the Option is
binding upon it and  enforceable  regardless  of the dilution that such issuance
may have on the ownership interests of other stockholders.

         7. Chief Financial  Officer's Report as to Adjustments.  In the case of
any adjustment or  re-adjustment  in the shares of Series A Stock (or the shares
of Common  Stock  thereunder)  issuable  upon the exercise of this Option or the
Warrants contained therein, the Company at its expense will promptly compute the
adjustment  or  re-adjustment  in  accordance  with the terms of this Option and
Warrants and, if requested by the Holder,  cause its Chief Financial  Officer to
certify  the  computation  (other  than any  computation  of the  fair  value of
property as  determined  in good faith by the Board of Directors of the Company)
and prepare a report setting forth the adjustment or  re-adjustment  and showing
in reasonable detail the method of calculation  thereof and the facts upon which
the  adjustment  or  re-adjustment  is based,  including a statement of: (a) the
number of shares of Series A Stock and Common Stock  outstanding or deemed to be
outstanding  and (b) the Unit  Price in effect  immediately  prior to the deemed
issuance  or sale and as  adjusted  and  re-adjusted  (if  required by Section 4
hereof) on account  thereof and the number of shares  issuable  upon exercise of
the Option.  The Company will forthwith mail a copy of each report to the Holder
and will,  upon the written  request at any time of the  Holder,  furnish to the
Holder a like report  setting forth the Unit Price at the time in effect and the
number of shares  issuable upon exercise of the Option and showing in reasonable
detail how it was  calculated.  The Company will also keep copies of all reports
at its office maintained  pursuant to Section 11.2(a) hereof and will cause them
to be available for  inspection at the office during normal  business hours upon
reasonable  notice by the  Holder or any  prospective  purchaser  of the  Option
designated by the Holder thereof.

                                       4
<PAGE>

         8.  Reservation  of Shares.  The Company shall at all times reserve and
keep available out of its  authorized but unissued  shares of Series A Stock and
Common Stock,  free from all taxes,  liens and charges with respect to the issue
thereof  and not be  subject to  preemptive  rights or other  similar  rights of
stockholders of the Company, solely for the purpose of effecting the exercise of
the Option and Warrants  contained  therein (and the  conversion of the Series A
Stock  contained  therein),  such number of its shares of Common  Stock as shall
from time to time be sufficient to effect the exercise of the Option,  and if at
any time the number of authorized but unissued  shares of Common Stock shall not
be  sufficient  to effect the  exercise  of the Option  and  Warrants  contained
therein, in addition to such other remedies as shall be available to Holder, the
Company will take such  corporate  action as may, in the opinion of its counsel,
be necessary to increase the number of authorized but unissued  shares of Common
Stock  to such  number  of  shares  as shall be  sufficient  for such  purposes,
including  without  limitation,  using its best efforts to obtain the  requisite
stockholder  approval  necessary to increase the number of authorized  shares of
the  Company's  Common  Stock.  All  shares of Series A Stock (or the  shares of
Common Stock thereunder) issuable upon exercise of the Option and Warrants shall
be duly authorized and, when issued upon exercise,  shall be validly issued and,
in the case of shares, fully paid and nonassessable.

         9. Registration and Listing.

                  9.1 The Company shall file a  registration  statement with the
Securities and Exchange Commission (the "SEC") as soon as reasonably practicable
following the  conclusion  of the Offering  covering the resale of the shares of
Common Stock issuable upon the conversion of the Series A Stock and the exercise
of the Warrants  issuable  upon the exercise of this  Option.  In addition,  the
Company  shall  use  reasonable  efforts  to have  such  registration  statement
declared  effective  by the  Commission  by no later  than  March 31,  2004 (the
"Target Effective Date"), and to maintain the effectiveness of such registration
statement until the third (3rd) anniversary of the closing of this Offering.  In
the  event  that  the  Company  fails  to  have  the  Commission   declare  such
registration statement effective by the Target Effective Date, then the dividend
rate on the shares of Series A Stock receivable upon the exercise of this Option
shall   increase  by  2%  for  each  whole  calendar  month  during  which  such
registration  statement is not declared  effective by the SEC; provided however,
that in no event shall the dividend rate exceed 20%. Upon the  effectiveness  of
such  registration  statement,  the  dividend  rate shall  re-adjust  to 11%. In
addition  to the  foregoing,  the Company  furthermore  grants to the Holder any
additional  "piggyback" or other registration rights granted to the investors in
the Offering.

                  9.2 The Company  shall  secure the listing of the Common Stock
underlying  the Units  upon  each  national  securities  exchange  or  automated
quotation  system upon which shares of Common Stock are then listed  (subject to
official notice of issuance) and shall maintain such listing of shares of Common
Stock  issued  under the terms of the  Option.  The  Company  shall at all times
comply  in  all  respects  with  the  Company's  reporting,   filing  and  other
obligations under the by-laws or rules of the National Association of Securities
Dealers,  Inc. and the NASDAQ SmallCap Market (or such other national securities
exchange or market on which the Common Stock may then be listed, as applicable).

                                       5
<PAGE>

                  9.3 The  Company  will  prepare  and  file  with  the SEC such
amendments  and  supplements to the  registration  statement (and the prospectus
contained  therein) referred to in Section 9.1 above as may be necessary to keep
such  registration   statement  effective  until  the  sale  of  the  securities
registered  thereunder,  and shall comply with the  provisions of the Securities
Act of 1933,  as amended  (the "Act")  with  respect to the  disposition  of all
securities owned by the Holder that are covered by such  registration  statement
during such period in accordance with the intended methods of disposition by the
Holder. The Company at its own expense will furnish to the Holder such number of
copies of such registration  statement,  each amendment and supplement  thereto,
the  prospectus  included  in  such  registration   statement   (including  each
preliminary  prospectus)  and such other  documents as the Holder may request in
order to facilitate the disposition of the shares owned by the Holder.

                  9.4  The  Company  shall  pay  all  expenses  relating  to the
registration and listing obligations set forth in this Section 9.

         10. Restrictions on Transfer.

                  10.1 Restrictive  Legends.  This Option and each Option issued
upon transfer or in  substitution  for this Option  pursuant to Section 11, each
certificate  for Common  Stock  issued upon the  exercise of the Option and each
certificate  issued  upon  the  transfer  of any  such  Common  Stock  shall  be
transferable only upon satisfaction of the conditions  specified in this Section
10 and  Section  11.4.  Each of the  foregoing  securities  shall be  stamped or
otherwise  imprinted with a legend  reflecting the  restrictions on transfer set
forth in Section 10 and Section 11.4 hereof and any restrictions  required under
the Act.

                  10.2 Notice of Proposed Transfer; Opinion of Counsel. Prior to
any  transfer of any  securities  which are not  registered  under an  effective
registration statement under the Act ("Restricted Securities"),  the Holder will
give  written  notice  to the  Company  of the  Holder's  intention  to affect a
transfer and to comply in all other respects with this Section 10.2. Each notice
(a) shall describe the manner and  circumstances of the proposed  transfer,  and
(b) shall  designate  counsel  for the  Holder  giving  the  notice  (who may be
in-house  counsel for the Holder).  The Holder  giving notice will submit a copy
thereof to the counsel designated in the notice. The following  provisions shall
then apply:

                           (i) If in the  opinion  of  counsel  for  the  Holder
reasonably  satisfactory  to the Company the  proposed  transfer may be effected
without registration of Restricted Securities under the Act (which opinion shall
state the basis of the legal  conclusions  reached  therein),  the Holder  shall
thereupon be entitled to transfer the Restricted  Securities in accordance  with
the terms of the notice delivered by the Holder to the Company. Each certificate
representing  the Restricted  Securities  issued upon or in connection  with any
transfer shall bear the restrictive legends required by Section 10.1 hereof.

                           (ii) If the  opinion  called  for in (i) above is not
delivered,  the  Holder  shall  not  be  entitled  to  transfer  the  Restricted
Securities until either (x) receipt by the Company of a further notice from such
Holder pursuant to the foregoing provisions of this Section 10.2 and fulfillment
of the provisions of clause (i) above,  or (y) such  Restricted  Securities have
been effectively registered under the Act.

                                       6
<PAGE>

                           Notwithstanding  any other  provision of this Section
10, no opinion of  counsel  shall be  necessary  for a  transfer  of  Restricted
Securities by the holder  thereof to any Person  employed by or owning equity in
the  Holder,  if the  transferee  agrees in  writing  to be subject to the terms
hereof  to the same  extent as if the  transferee  were the  original  purchaser
hereof and such transfer is permitted under applicable securities laws.

                  10.3 Termination of Restrictions.  The restrictions imposed by
this Section 10 upon the  transferability  of Restricted  Securities shall cease
and terminate as to any particular Restricted  Securities:  (a) which Restricted
Securities shall have been effectively registered under the Act, or (b) when, in
the opinions of both counsel for the holder thereof and counsel for the Company,
such  restrictions are no longer required in order to insure compliance with the
Act or Section 11 hereof.  Whenever such restrictions  shall cease and terminate
as to any Restricted Securities, the Holder thereof shall be entitled to receive
from the Company,  without  expense (other than  applicable  transfer  taxes, if
any), new securities of like tenor not bearing the applicable  legends  required
by Section 10.1 hereof.

         11. Ownership, Transfer and Substitution of Option.

                  11.1 Ownership of Option.  The Company may treat the person in
whose  name this  Option is  registered  to in the  Option  Register  maintained
pursuant  to  Section  11.2(a)  hereof as the owner and holder  thereof  for all
purposes,  notwithstanding any notice to the contrary,  except that, if and when
any Option is  properly  assigned  in blank,  the  Company may (but shall not be
obligated  to) treat the  bearer  thereof  as the owner of such  Option  for all
purposes,  notwithstanding  any  notice to the  contrary.  Subject to Section 10
hereof,  this  Option,  if properly  assigned,  may be exercised by a new holder
without a new Option first having been issued.

                  11.2 Office; Exchange of Option.

                           (a) The Company will maintain its principal office as
described in the PPM or such other  offices as the Company  notifies the holders
of the Option.

                           (b) The Company  shall cause to be kept at its office
maintained  pursuant  to  Section  11.2(a)  hereof  an Option  Register  for the
registration  and transfer of the Option.  The names and addresses of the holder
of the Option,  the transfers thereof and the names and addresses of transferees
of the Option shall be registered in such Option  Register.  The Person in whose
name the Option shall be so registered  shall be deemed and treated as the owner
and holder thereof for all purposes of this Option, and the Company shall not be
affected by any notice or knowledge to the contrary.

                           (c)  Upon  the  surrender  of this  Option,  properly
endorsed,  for  registration  of transfer  or for  exchange at the office of the
Company  maintained  pursuant  to Section  11.2(a)  hereof,  the  Company at its
expense  will  (subject to  compliance  with Section 10 hereof,  if  applicable)
execute and  deliver to or upon the order of the Holder  thereof a new Option

                                       7
<PAGE>

of like tenor,  in the name of such holder or as such  holder  (upon  payment by
such  holder of any  applicable  transfer  taxes)  may  direct,  calling  in the
aggregate  on the face thereof for the number of Units called for on the face of
the Option so surrendered.

                  11.3   Replacement   of  Option.   Upon  receipt  of  evidence
reasonably  satisfactory  to the  Company  of the loss,  theft,  destruction  or
mutilation of the Option and, in the case of any such loss, theft or destruction
of the Option, upon delivery of indemnity reasonably satisfactory to the Company
in form and  amount or, in the case of any  mutilation,  upon  surrender  of the
Option for  cancellation  at the office of the  Company  maintained  pursuant to
Section 11.2(a) hereof, the Company at its expense will execute and deliver,  in
lieu thereof, a new Option of like tenor and dated the date hereof.

         12.  No Rights  or  Liabilities  as  Stockholder.  No  Holder  shall be
entitled to vote or receive  dividends  or be deemed the holder of any shares of
Series A Stock or Common Stock or any other  securities of the Company which may
at any time be  issuable  on the  exercise  hereof  for any  purpose,  nor shall
anything  contained herein be construed to confer upon the Holder,  as such, any
of the  rights  of a  stockholder  of the  Company  or any right to vote for the
election  of  directors  or upon any matter  submitted  to  stockholders  at any
meeting thereof, or to give or withhold consent to any corporate action (whether
upon any recapitalization,  issuance of stock, reclassification of stock, change
of par value,  consolidation,  merger,  conveyance,  or otherwise) or to receive
notice of meetings,  or to receive dividends or subscription rights or otherwise
until the  Option  shall  have been  exercised  and the  shares of Common  Stock
purchasable upon t1he exercise hereof shall have become deliverable, as provided
herein. The Holder will not be entitled to share in the assets of the Company in
the event of a liquidation, dissolution or the winding up of the Company.

         13. Notices.  Any notice or other communication in connection with this
Option shall be deemed to be given if in writing (or in the form of a facsimile)
addressed as hereinafter provided and actually delivered at said address: (a) if
to any  Holder,  at the  registered  address of such  holder as set forth in the
Option Register kept at the office of the Company maintained pursuant to Section
11.2(a)  hereof,  or (b) if to  the  Company,  to  the  attention  of its  Chief
Financial Officer at its office  maintained  pursuant to Section 11.2(a) hereof;
provided,  however,  that the  exercise of the Option  shall be effective in the
manner provided in Section 3 hereof.

         14. Payment of Taxes. The Company will pay all documentary  stamp taxes
attributable  to the issuance of shares of Common Stock  underlying  this Option
upon exercise of this Option;  provided,  however, that the Company shall not be
required to pay any tax which may be payable in respect of any transfer involved
in the  registration of any  certificate  for shares of Common Stock  underlying
this Option in a name other that of the Holder.  The Holder is  responsible  for
all other tax  liability  that may arise as a result of holding or  transferring
this Option or  receiving  shares of Common  Stock  underlying  this Option upon
exercise hereof.

         15.  Miscellaneous.  This  Option and any term  hereof may be  changed,
waived,  discharged or terminated only by an instrument in writing signed by the
party against which enforcement of the change, waiver,  discharge or termination
is sought.  This Option shall be construed and enforced in  accordance  with and
governed  by the laws of the State of New York.  The  section  headings  in this
Option are for  purposes of  convenience  only and shall not  constitute  a part
hereof.

                                       8
<PAGE>

         IN WITNESS  WHEREOF,  the Company has caused this Placement Agent Units
Purchase Option to be duly executed as of the date first above written.

                          WHITEWING ENVIRONMENTAL CORP.

                          By: ______________________________________________
                              Name: Norman Raben
                              Title: Executive Vice President and Secretary

                                       9
<PAGE>

                                    EXHIBIT A

                             FORM OF EXERCISE NOTICE

                 [To be executed only upon conversion of Option]

To WHITEWING ENVIRONMENTAL CORP.:

         The  undersigned   registered   holder  of  the  within  Option  hereby
irrevocably  exercises  the Option  pursuant  to Section  3.1 of the Option with
respect to  __________(1)  Units, at an exercise price per Unit of $____,  which
the holder  would be  entitled to receive  upon the cash  exercise  hereof,  and
requests that the certificates for the shares and Warrants be issued in the name
of, and delivered to, whose address is:

Dated: _______________

                            ---------------------------------------------------
                            Print or Type Name

                            ---------------------------------------------------
                            (Signature  must  conform in all  respects to
                            name of holder as  specified on the face of Option)

                            ---------------------------------------------------
                            (Street Address)

                            ---------------------------------------------------
                            (City) (State) (Zip Code)

-----------------------
(1) Insert here the number  Units on the face of this Option (or, in the case of
a  partial  exercise,  the  portion  thereof  as to which  this  Option is being
exercised),  in either case without  making any  adjustment  of shares of Common
Stock or any other stock or other securities or property or cash which, pursuant
to the adjustment  provisions of this Option, may be delivered upon exercise. In
the case of a partial  exercise,  a new  Option  will be issued  and  delivered,
representing the unconverted  portion of the Option, to the holder  surrendering
the Option.

<PAGE>

                                    EXHIBIT B

                               FORM OF ASSIGNMENT

                  [To be executed only upon transfer of Option]

         For value  received,  the undersigned  registered  holder of the within
Option hereby sells, assigns and transfers unto  _____________________ the right
represented  by  the  Option  to  purchase   __________(1)  Units  of  WHITEWING
ENVIRONMENTAL    CORP.   to   which   the   Option    relates,    and   appoints
_____________________  Attorney to make such  transfer on the books of WHITEWING
ENVIRONMENTAL CORP.  maintained for the purpose, with full power of substitution
in the premises.

Dated:                                  ________________________________________
                                        (Signature must conform in all respects
                                        to name of holder as specified on the
                                        face of Option)

                                        ----------------------------------------
                                        (Street Address)

                                        ----------------------------------------
                                        (City) (State) (Zip Code)

Signed in the presence of:

                                        ----------------------------------------
                                        (Signature of Transferee)

                                        ----------------------------------------
                                        (Street Address)

                                        ----------------------------------------
                                        (City) (State) (Zip Code)
Signed in the presence of:

-----------------------
(1) Insert here the number  Units on the face of this Option (or, in the case of
a  partial  exercise,  the  portion  thereof  as to which  this  Option is being
exercised),  in either case without  making any  adjustment  of shares of Common
Stock or any other stock or other securities or property or cash which, pursuant
to the adjustment  provisions of this Option, may be delivered upon exercise. In
the case of a partial  exercise,  a new  Option  will be issued  and  delivered,
representing the unconverted  portion of the Option, to the holder  surrendering
the Option.

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