Document:

EMPLOYMENT AND CONSULTATION AGREEMENT

         EMPLOYMENT AND  CONSULTATION  AGREEMENT made as of the 1st day of June,
2000, by and between BALTEK CORPORATION,  a Delaware corporation with offices at
10 Fairway Court, Northvale, New Jersey 07647 (the "Company"),  and Antonio Diaz
("Diaz"), residing at 15 Pennsylvania Avenue, Valley Cottage, New York 10989.

                              W I T N E S S E T H:
                              --------------------

         WHEREAS,  Diaz has been  employed  by the  Company as Vice  President -
Latin American Operations; and

         WHEREAS,  the Company and Diaz desire Diaz to continue  his  employment
with the Company as Vice  President - Latin American  Operations  until December
31, 2001 and  thereafter to act as a consultant  to the Company,  for the period
from  January 1, 2002 to December  31,  2003,  upon the terms and subject to the
conditions set forth in this Agreement;

         NOW,  THEREFORE,  in  consideration  of the  premises  and  the  mutual
covenants contained in this Agreement, Diaz and the Company agree as follows:

         1.  Employment.  The Company  agrees to continue to employ Diaz as Vice
President  - Latin  American  Operations  for the  period  from  June 1, 2000 to
December 31, 2001 (the " Employment  Period") and thereafter to retain Diaz as a
consultant  for the  period  from  January  1, 2002 to  December  31,  2003 (the
"Consultation Period"), and Diaz agrees to continue in the employ of the Company
as Vice President - Latin American  Operations during the Employment Period, and
thereafter to act as a consultant to the Company during the Consultation Period,
all upon and subject to the terms and conditions set forth in this Agreement. By
mutual written agreement of Diaz and the Company, the Consultation Period may be
extended beyond December 31, 2003.

         2.  Term.  This  Agreement  shall  commence  on June 1,  2000 and shall
terminate  on December  31,  2003,  unless  this  Agreement  is extended  beyond
December  31, 2003 by mutual  written  agreement  of Diaz and the  Company  (the
period  from  June 1,  2000  until  the date  this  Agreement  terminates  being
hereinafter referred to as the "Term" of this Agreement).

         3. Duties.

         (a) During  the  Employment  Period,  Diaz  shall be  employed  as Vice
President - Latin American  Operations,  of the Company,  shall utilize his best
efforts to enhance the business of the Company and,  subject to the  supervision
of the  Company's  President  and Chief  Executive  Officer  (the "CEO") and the
Company's Board of Directors (the "Board"), shall be responsible for the general
and supervisory  duties  normally and customarily  attendant to such position at
the Company and its divisions and  subsidiaries.  During the Employment  Period,
unless the Board  shall  otherwise  consent in  writing,  Diaz will,  during the
regular business hours of the Company, devote his full time, energies, labor

                                       -1-

<PAGE>

and skills to the business of the Company and to the duties and responsibilities
specified in this subparagraph (a) of this paragraph 3.

         (b) During the Consultation  Period,  Diaz will consult with the Board,
the CEO and the other officers of the Company on a regular basis with respect to
the Latin  American  Operations of the Company,  will render such other services
relating to the Latin American Operation of the Company as may from time to time
be  requested  of him by the Board or the CEO and will  devote such time to such
consultation and other services as may be necessary.  The consultation and other
services to be performed by Diaz during the Consultation Period may generally be
performed by Diaz from his residence in New York or Florida.  Diaz may, however,
from time to time during the  Consultation  Period,  be required by the Board or
the CEO to  travel  to the  offices  of the  Company,  or to  Latin  America  or
elsewhere, in connection with the business of the Company.

         4. Compensation.  (a) In full consideration for all services to be per-
formed  by Diaz for the  Company  and  pursuant  to this  Agreement  during  the
Employment  Period, the Company shall pay to Diaz, and Diaz agrees to accept, an
annual salary of two hundred fifteen thousand ($215,000) dollars (or such higher
amount as may be approved  from time to time by the  Board),  payable in monthly
installments in accordance with the Company's  customary payroll practices.  The
Company shall annually  review Diaz's salary to determine  whether,  and to what
extent,  if any,  such salary shall be adjusted.  Any increase in Diaz's  salary
shall be in the sole  discretion of the Company.  In addition to Diaz's  salary,
the Company,  as a special  bonus to Diaz (the  "Special  Bonus")  shall,  as of
December 31, 2001, cancel the present indebtedness of Diaz to the Company in the
amount of twenty-five thousand ($25,000) dollars (the "Diaz Indebtedness").

         (b) In full  consideration for all services to be performed by Diaz for
the Company and pursuant to this Agreement during the Consultation  Period,  the
Company shall pay to Diaz,  during the Consultation  Period,  and Diaz agrees to
accept,  a consultation  fee of nine thousand five hundred  ($9,500) dollars per
month. During the Consultation Period Diaz will be an independent contractor and
not an employee of the Company,  and will be solely  responsible for the payment
of all income,  FICA and other taxes  payable with respect to such  consultation
fee and the filing of all required tax returns.

         (c) In  addition  to the salary and  consultation  fee  referred  to in
subparagraphs (a) and (b) of this paragraph 4, the Company shall reimburse Diaz
for all expenses  reasonably incurred by Diaz in connection with the performance
of his  duties  under  this  Agreement  and  the  business  of the  Company,  in
accordance   with  the  Company's  usual  policies  and  practices  for  expense
reimbursement.  In the event  Diaz is  required  to travel  on  business  of the
Company  during the  Consultation  Period,  as provided in  subparagraph  (b) of
paragraph  3,  Diaz may  travel by air in  business  class and may stay in first
class hotels during such travel period.

         5. Vacation.  Diaz shall be entitled to four (4) weeks of paid vacation
during each twelve (12) months of the  Employment  Period,  to be taken at times
mutually  agreeable to Diaz and the  Company.  Any vacation not taken during the
twelve  (12)  months in which  such  vacation  is earned may not be taken in any
subsequent period, but Diaz shall be entitled to be paid for up to two (2) weeks
of any earned vacation which is not taken during any twelve (12) month period.

                                       -2-

<PAGE>

In the event Diaz's  employment is terminated for any reason prior to the end of
the  Employment  Period,  Diaz shall be paid for accrued  vacation time, if any,
which has not been taken,  calculated on a pro-rata basis, but in no event shall
such amount exceed more than four (4) weeks' salary.

         6. Benefits.  Throughout the Employment Period,  Diaz shall be eligible
to participate in any pension,  profit-sharing,  stock option or similar plan or
program of the Company now existing or hereafter  established and maintained for
the benefit of the Company's  employees or executives  generally,  to the extent
that Diaz is eligible under the general provisions  thereof.  Diaz shall also be
entitled to  participate  during the Employment Period in any group  insurance,
hospitalization,  medical,  health,  accident,  disability  or  similar  plan or
program of the Company now existing or hereafter established for the benefit of
the  Company's  employees or  executives  generally,  to the extent that Diaz is
eligible under the general provisions thereof.  During the Consultation  Period,
Diaz, as well as his wife,  will  continue to be covered,  at the expense of the
Company, under any hospitalization or medical plan maintained by the Company for
its  employees,  to such extent and for such period of time as may be  permitted
under  the  Consolidated  Omnibus  Budget  Reconciliation  Act of  1985  and the
regulations issued thereunder, as in effect at such time.

         7. Company Car. To permit Diaz to perform his duties more  effectively,
the Company  shall,  during the Term of this Agreement [and if this Agreement is
terminated  under any of the  circumstances  described  in  subparagraph  (f) of
paragraph 8 of this Agreement, until the end of the Consultation  Period]  lease
a suitable  automobile  for the use of Diaz, and reimburse Diaz for all expenses
of operating and maintaining such  automobile,  including,  without  limitation,
comprehensive and liability insurance, in accordance with the Company's policies
and practices for executive company cars.

         8. Termination of Agreement.

         (a)  Notwithstanding  any provisions to the contrary  contained in this
Agreement, this Agreement may be terminated by the  Company upon Diaz's death or
disability  (as  defined  below) or for Cause (as defined  below),  and Diaz may
terminate  this Agree ment for Good  Reason (as  defined  below) upon sixty (60)
days' prior written notice to the Company.

         (b) For purposes of this Agreement, "disability" shall mean that, for a
period of one hundred twenty (120)  consecutive days or more, or for one hundred
eighty (180) days or more (even though not consecutive) within any three hundred
sixty (360) day period,  Diaz is  mentally or  physically  unable to perform the
essential  duties of his position as Vice  President - Latin America  Operations
(notwithstanding reasonable accommodation by the Company as required by law), or
as a consultant to the Company,  as the case may be, as evidenced by the written
certification of a qualified physician agreed to by the Company  and Diaz or, in
the  absence  of  such  agreement,  by a  qualified  physician  selected  by the
agreement  of a  qualified  physician  selected  by the  Company and a qualified
physician selected by Diaz.

                                       -3-

<PAGE>

         (c) For  purposes  of  this  Agreement,  "Cause"  shall  mean:  (i) the
conviction  of Diaz for a  felony  by a  federal  or  state  court of  competent
jurisdiction;  or (ii) Diaz's failure either (A) to follow a direct  substantive
written  order,  within the  reasonable  scope of Diaz's  duties,  from the CEO,
pursuant to authority from the Board,  or (B) to adhere to any written policy or
guideline  established  by the  Company  from time to time,  if such  failure to
follow  such order or adhere to such  policy or  guideline  is not cured  within
thirty (30) days after written notice to Diaz specifying such failure.

         (d) For purposes of this Agreement, "Good Reason" shall mean any of the
following:  (i) the  assignment  by the Company to Diaz,  during the  Employment
Period, of substantial duties  significantly  below the level of Diaz's position
as Vice  President - Latin American  Operations of the Company,  as set forth in
subparagraph  (a) of paragraph 3 of this  Agreement;  or (ii) the failure of the
Company to assign to Diaz, during the Employment Period,  substantial duties and
responsibilities  consistent  with such position;  or (iii) any reduction by the
Company during the  Employment  Period of Diaz's salary or benefits as set forth
in  subparagraph  (a) of paragraphs 4 or paragraph 6 of this Agreement (it being
understood  that a reduction of benefits  applicable  to all  executives  of the
Company (including Diaz) shall not be deemed a reduction of  Diaz's benefits for
purposes of this definition.

         (e) In the event that Diaz's  employment under this Agreement is termi-
nated during the Employment Period as a result of death, disability or for Cause
by the Company,  or without Good Reason by Diaz,  then the Company shall have no
further  obligation  or liability  to Diaz under this  Agreement,  such that all
salary  and  benefits  provided  for  in  this  Agreement  (including,   without
limitation,   the  Special  Bonus)  shall  terminate  simultaneously  with  such
termination,  except for salary or fees and benefits  earned and accrued through
the date of such termination.

         (f) In the event that during the  Employment  Period the Company termi-
nates the  employment of Diaz pursuant to this  Agreement  other than for Cause,
death or disability,  or Diaz  terminates his employment with the Company during
the  Employment  Period with Good Reason (i) the Company  shall pay to Diaz,  in
each month following such termination,  until the end of the Employment  Period,
an amount equal to  one-twelfth of Diaz's annual salary in effect on the date of
termination,  (ii) the Company shall cancel the Diaz Indebtedness,  and (iii) if
such  termination  shall  occur  ninety  (90) days or less prior to the end of a
fiscal year of the Company, the Company shall, in accordance with any exe cutive
compensation  or  incentive  plan of the  Company  in effect at the time of such
termination, pay to Diaz any bonus and make on behalf of Diaz any profit sharing
plan  contribution  which the Company would  otherwise have paid or made if Diaz
had remained in the employ of the Company through the end of such fiscal year.

         (g) In the event that during the Consultation Period Diaz is terminated
as a consultant to the Company as a result of death,  disability or for Cause by
the  Company,  or Diaz fails to act as a  consultant  to the Company at any time
during the Consultation Period for any other reason, then the Company shall have
no further  obligation or liability to Diaz under this Agreement,  such that all
fees and benefits provided for in this Agreement shall terminate  simultaneously
with such termination or failure to act, except for fees and benefits earned and
accrued through the date of such termination or failure to act.

                                       -4-

<PAGE>

         (h) In the event that during the Consultation Period Diaz is terminated
as a consultant  to the Company for any reason other than death,  disability  or
for  Cause by the  Company  (i) the  Company  shall pay to Diaz,  in each  month
following such termination, until the end of the Consultation Period, the amount
of the monthly fee specified in subparagraph (b) of paragraph 4.

         9. Covenants of Diaz.

         (a) Diaz  acknowledges  that his  employment by the Company has brought
him and will  throughout the Term of this  Agreement  continue to bring him into
close  contact  with  many  confidential  affairs  of  the  Company,   including
information  about  costs,  profits,  markets,  sales,  key  personnel,  pricing
policies,   operational   methods  and  other  business  affairs,   methods  and
information,  including plans for future developments,  not readily available or
generally known to the public. Diaz further acknowledges that the services to be
performed  by him  under  this  Agreement  are of a  special,  unique,  unusual,
extraordinary  and  intellectual  character,  and  that  the  Company  currently
competes or intends to compete with other  organizations that are located in all
of the  states of the United  States.  In  recognition  of the  foregoing,  Diaz
covenants and agrees that:

                           (i) he will not during the Term of this  Agreement or
                  following the expiration of this Agreement or the  termination
                  of this Agreement for any reason (the date of such  expiration
                  or   termination   being   hereinafter   referred  to  as  the
                  "Termination Date") divulge,  disclose,  publish or use (other
                  than for the benefit of the  Company)  any matter  relating to
                  the Company  which is not  publicly  available  and  generally
                  known  and will not  intentionally  disclose  such  matter  to
                  anyone  (other than to  executives or employees of the Company
                  who are  required to have  knowledge of such  matter),  except
                  that Diaz may make such  disclosure as may be required by law,
                  provided  the  Company is  notified by Diaz in writing of such
                  requirement  not less than ten (10) business days prior to the
                  date such  disclosure  is so required  and the Company has not
                  obtained an order or ruling to prevent such disclosure;

                           (ii) he will  deliver  promptly to the Company at the
                  end of the Term of this  Agreement,  or at any other  time the
                  Company may so request, all memoranda, notes, records, reports
                  and other documents (and all copies  thereof)  relating to the
                  business of the Company which he obtained while employed by or
                  otherwise  serving or acting on behalf of, the  Company,  as a
                  consultant or otherwise, and which he may then possess or have
                  under his control;

                           (iii)  during  the  Term  of this  Agreement  and any
                  additional  period  during  which  Diaz  may  be  employed  or
                  retained by the Company as a consultant or otherwise  (whether
                  or not such  employment  or  retention  shall be pursuant to a
                  written  agreement),  he will  not,  unless  the  Board  shall
                  otherwise consent in writing, alone or together with any other
                  person,  firm,   partnership,   corporation  or  other  entity
                  whatsoever (except a subsidiary or affiliate of the Company),

                                       -5-

<PAGE>

                  directly  or  indirectly,  whether  as an  officer,  director,
                  stockholder,   partner,   proprietor,   associate,   employee,
                  representative,     public     relations    or     advertising
                  representative, management consultant or otherwise, engage in,
                  or have any  material  financial  or monetary  interest in, or
                  have any  financial or monetary  association  with,  any other
                  person, corporation, firm, partnership or other entity engaged
                  in, the composite  materials or seafood  business or any other
                  business which is competitive  with any business  conducted or
                  contemplated by the Company; and

                           (iv)  for  a  period  of   twenty-four   (24)  months
                  following the Termination Date, he will not:

                                    (A)  solicit,  or  attempt to  solicit,  any
                           person or entity  who or which is a  customer  of the
                           Company  (as of the  Termination  Date or at any time
                           prior thereto) as a customer for any person or entity
                           engaged  in  the   composite   materials  or  seafood
                           business,  or any other business which is competitive
                           with any business  conducted or  contemplated  by the
                           Company; or

                                    (B) otherwise  disrupt or interfere with, or
                           attempt to disrupt or interfere  with,  the Company's
                           relations  with any actual or  potential  customer or
                           supplier or any other relationship of the Company.

         (b) Diaz recognizes  that the territorial and time  limitations in this
paragraph 9 are reasonable and properly required for the adequate protection of
the business of the Company,  and that in the event that any such territorial or
time   limitation  is  deemed  to  be  unreasonable  by  a  court  of  competent
jurisdiction,  Diaz  agrees  to a  reduction  of said such  territorial  or time
limitation,  as the case may be,  to such area or  period  as such  court  deems
reasonable. In the event that Diaz shall be in violation of any of the covenants
contained in this  paragraph 9, the time  limitation  thereof shall be extended
for a period of time equal to the  period of time  during  which such  breach or
breaches should exist.

         (c) Diaz  further  agrees  that the  remedy  at law for any  breach  or
threatened breach of any of the covenants contained in this paragraph 9 will be
inadequate  and that the Company,  in addition to such other  remedies as may be
available  to it, at law or in equity,  shall be entitled to  injunctive  relief
without bond or other  security.  This paragraph 9 constitutes  independent  and
severable  covenants and, if any or all of the provisions of this paragraph 9 is
or are held to be invalid or  unenforceable  for any reason,  such invalidity or
unenforceability shall not in any way invalidate or affect the remainder of this
paragraph 9 or the remainder of this Agreement,  as the case may be, which shall
remain in full force and effect.

                                       -6-

<PAGE>

         10. Governing Law. This Agreement shall be construed in accordance with
and  governed  by the laws of the State of New Jersey  applicable  to  contracts
executed in and to be performed solely within such state.

         11.  Notices.  All notices  required or permitted to be given by either
party pursuant to this Agreement,  including notice of change of address,  shall
be in writing and delivered by hand, or mailed,  postage  prepaid,  certified or
registered mail, return receipt requested, to the other party as follows:

              If to the Company:         Baltek Corporation
                                         10 Fairway Court
                                         Northvale, New Jersey 07047

                                         Attention:
                                         President and Chief
                                         Executive Officer

              If to Executive:           Antonio Diaz
                                         15 Pennsylvania Avenue
                                         Valley Cottage, New York 10989

         12. Miscellaneous.

         (a) Entire Agreement.  This Agreement  constitutes the entire agreement
between the parties with respect to the subject matter hereof and supersedes any
and all prior oral or written  agreements  and  understandings  relating  to the
employment  of Diaz by the Company or the  retention of Diaz as a consultant  to
the  Company.  There  are no  oral  promises,  representations,  understandings,
interpretations  or  terms  of any  kind as  conditions  or  inducements  to the
execution  this  Agreement  by Diaz  or in  effect  between  the  parties.  This
Agreement may not be amended, and no provision hereof shall be waived, except by
a writing signed by the Company and Diaz (or in the case of a waiver of a provi-
sion of this Agreement, by the party waiving compliance therewith), which states
that it is  intended,  as the case may be, to amend  this  Agreement  or waive a
provision  of this  Agreement.  Any  waiver of any right or  failure to act in a
specific  instance shall relate only to such instance and shall not be construed
as an  agreement  to waive any right or  failure  to act in any other  instance,
whether or not similar.

         (b)  Severability.  Should any provision of this Agreement be held by a
court of competent  jurisdiction to be unenforceable or prohibited by applicable
law, this Agreement shall be considered  divisible as to such  provision,  which
shall be  inoperative,  and the remainder of this  Agreement  shall be valid and
binding as if such provision were not included in this Agreement.

                                       -7-

<PAGE>

         (c) Successors and Assigns.  This Agreement  shall inure to the benefit
of, and be binding upon, the Company and any corporation  with which the Company
merges or consolidates or to which the Company sells all or substantially all of
its assets,  and upon Diaz and his  executors,  administrators,  heirs and legal
representatives.

         (d) Headings.  All headings in this Agreement are for convenience  only
and are not intended to affect the meaning of any provision hereof.

         (e)  Counterparts.  This  Agreement  may be executed in two (2) or more
counterparts  with the same effect as if the signatures to all such counterparts
were upon the same instrument,  and all such  counterparts  shall constitute but
one instrument.

         IN WITNESS  WHEREOF,  Diaz has executed this  Agreement and the Company
has caused this  Agreement to be executed by its duly  authorized  officer as of
the day and year first above written.

                                 BALTEK CORPORATION

                                 By:     /s/ Jacques Kohn
                                     -------------------------------------------
                                          Jacques Kohn, President and
                                          Chief Executive Officer

                                                /s/ Antonio Diaz
                                     -------------------------------------------
                                                   Antonio Diaz

                                       -8-SAFESCIENCE, INC.

                              Employment Agreement
                              --------------------

         THIS EMPLOYMENT AGREEMENT, dated as of this 29th day of June, 1999
(this "Agreement"), is between SafeScience, Inc., a Nevada corporation
(hereinafter called the "Employer"), and Bradley J. Carver (hereinafter called
the "Employee").

         WHEREAS, the Employer desires to employ the Employee as its President,
and the Employee desires to accept such employment, all upon the terms and
conditions set forth below.

         NOW, THEREFORE, in consideration of the premises and the mutual
promises hereinafter set forth, the parties hereto hereby mutually agree as
follows:

         1. Employment. The Employer hereby employs the Employee, and the
Employee hereby accepts employment, upon and subject to the terms and conditions
set forth herein.

         2. Effective Date and Term. The term (the "Term") of employment of the
Employee hereunder shall commence as of the date first above written (the
"Effective Date") and shall continue until the third anniversary of the
Effective Date unless terminated earlier in accordance with the provisions
hereof or unless extended in writing by the Employer and Employee.

         3. Title, Powers and Duties; Extent of Services. The Employee shall
promote the business and affairs of the Employer as its President. The Employee
shall report and be responsible to the Board of Directors of the Employer (the
"Board"), and, except for vacations and absences due to temporary illness or
disability, shall devote his full efforts, time, attention and energies to the
business and affairs of the Employer. As its President, the Employee shall have
the duties and responsibilities normally inherent in his position and such other
duties and responsibilities, consistent with his position, as may be reasonably
assigned to him by the Board from time to time. The Employee agrees to abide by
the rules, regulations, instructions, personnel practices and policies of the
Employer and any changes therein which may be adopted from time to time by the
Employer.

         4. Compensation.

                  4.1 Salary. During the Term, the Employer shall pay the
Employee a base salary at the annual rate of $180,000, payable in accordance
with the Employer's standard payroll practices. The base salary to which the
Employee is entitled pursuant to this Section 4.1 is hereinafter referred to as
the "Salary".

                  4.2 Expense Reimbursement. The Employer shall reimburse the
Employee for any actual expenses incurred by the Employee within the scope of
his employment under this Agreement so long as such expenses are reasonable and
necessary, appropriately documented, and in compliance with budgetary and policy
guidelines of the Employer. The Employee will be responsible for reporting and

<PAGE>

documenting his own tax deductions for un-reimbursed business expenses.

                  4.3 Benefits. The Employee shall be entitled to receive such
employee or fringe benefits as may be offered or made available by the Employer
from time to time to its employees (the "Benefits").

                  4.4 Bonuses. The Employee will be eligible to receive bonuses
in accordance with individual and company performance criteria established under
the Employer's stock option plan, as determined by the Compensation Committee of
the Board.

         5. Termination.

                  5.1 Termination upon Death. This Agreement and the Employee's
employment hereunder shall terminate immediately upon the Employee's death.

                  5.2 Termination. The Employer may at any time immediately
terminate the employment of the Employee under this Agreement with or without
Cause (as defined below). The Employee may at any time immediately terminate his
employment under this Agreement with or without Good Reason (as defined below).
The rights and obligations of the parties upon any termination of the Employee's
employment shall be as set forth in Section 5.3 hereof.

                           (a) For purposes of this Agreement, the term "Cause"
         shall mean (i) any act of dishonesty, gross negligence or willful
         misconduct with respect to the Employer, including without limitation,
         fraud or theft, on the part of the Employee, (ii) conviction of the
         Employee for a felony, or (iii) the Employee's sustained failure, as
         determined by the Employer's Board of Directors, to perform significant
         duties hereunder (which duties are not inconsistent with the terms of
         this Agreement) after notice and a thirty (30) day opportunity to cure.

                           (b) For purposes of this Agreement, the term "Good
         Reason" shall mean a material breach by the Employer of any term of
         this Agreement.

                  5.3 Rights Upon Termination. In the event that:

                           (a) the employment of the Employee is terminated by
         the Employee for Good Reason or by the Employer without Cause, then for
         the remainder of the Term, the Employer shall pay to the Employee, at
         the time otherwise due under Section 4, all Salary at the rate in
         effect at the time of termination plus, if not yet paid to the
         Employee, the Employee's bonus, if any, earned in the year prior to
         such termination at such time as such bonus would be paid had the
         Employee's employment hereunder not been terminated. The obligations of
         the Employer pursuant to this Section 5.3(a) shall be in lieu of any
         other rights of the Employee to compensation or Benefits hereunder, and
         no other compensation of any kind or any other amounts shall be due to
         the Employee by the Employer under this Agreement, except that Employee

                                      -2-
<PAGE>

         shall be entitled to continue to receive health benefits for the
         remainder of the Term.

                           (b) the Employee's employment terminates by reason of
         Employer's death or Permanent Disability, then the Employer shall pay
         and provide to the Employee or Employee's estate or other successor in
         interest at the time otherwise due under Section 4 all Salary and
         Benefits due to the Employee under Section 4 through the end of the day
         on which the termination occurs, but reduced in the case of disability
         by any payments received under any disability plan, program or policy
         paid for by the Employer. For purposes of this Agreement, "Permanent
         Disability" shall mean the Employee's inability to perform his or her
         duties hereunder for a continuous period of six (6) months by reason of
         his or her physical or mental illness or incapacity. In the event of
         any dispute concerning the existence of a Permanent Disability, such
         question shall be determined by a licensed physician selected by the
         Employer and reasonably acceptable to the Employee, whose determination
         shall be final and binding upon the parties. The Employee shall submit
         to such examinations and furnish such information as such physician may
         reasonably request.

                           (c) the employment of the Employee is terminated by
         the Employee without Good Reason or by the Employer for Cause, the
         Employee shall not be entitled to compensation or Benefits granted
         hereunder beyond the date of the termination of the Employee's
         employment, and no other compensation of any kind or any other amounts
         shall be due to the Employee by the Employer under this agreement.

                  5.4 Diminution of Responsibilities. For purposes of this
Section 5, a substantial diminution of the Employee's responsibilities or
authority as they relate to the Employer's business as a whole shall be deemed a
"termination" by the Company.

         6. Confidential Information.

                  6.1 Definitions. For purposes of this Agreement, the term
"Confidential Information" shall mean (i) confidential information, knowledge or
data of the Employer, (ii) trade secrets of the Employer and (iii) any other
information of the Employer disclosed to the Employee or to which the Employee
is given access prior to the termination of the Employee's employment with the
Employer. Without limiting the generality of the foregoing, the term
Confidential Information shall include (A) all inventions, improvements,
developments, ideas, processes, prototypes, plans, drawings, designs, models,
formulations, specifications, methods, techniques, shop-practices, discoveries,
innovations, creations, technologies, formulas, algorithms, data, computer
databases, reports, laboratory notebooks, papers, writings, photographs, source
and object codes, software programs, other works of authorship, and know-how
(including all records pertaining to any of the foregoing), whether or not
reduced to writing and whether or not patented or patentable or registered or
registrable under patent, copyright, trademark or similar statute, that are
owned by the Employer or that are required to be assigned to the Employer by any
person, including, without limitation, the Employee or any other employee or

                                      -3-
<PAGE>

consultant of the Employer, or that are licensed to the Employer by any person
(all of the foregoing items listed or described in this clause (A) are
hereinafter referred to, collectively, as "Inventions"), (B) information
regarding the Employer's plans for research and development or for new products,
(C) information regarding regulatory matters pertaining to the Employer, (D)
information regarding any acquisition or strategic alliance effected by the
Employer or any proposed acquisition or strategic alliance being considered by
the Employer, (E) information regarding the status or outcome of any
negotiations engaged in by the Employer, (F) information regarding the existence
or terms of any contract entered into by the Employer, (G) information regarding
any aspect of the Employer's intellectual property position, (H) information
regarding prices or costs of the Employer, (1) information regarding any aspect
of the Employer's business strategy, including, without limitation, the
Employer's marketing, selling and distribution strategies, (J) information
regarding customers or suppliers of the Employer, (K) information regarding the
skills, compensation and other terms of employment or engagement of the
Employer's employees and consultants, (L) business plans, budgets, unpublished
financial statements and unpublished financial data of the Employer, (M)
information regarding marketing and sales of any actual or proposed product or
services of the Employer and (N) any other information that the Employer may
designate as or reasonably deem to be confidential. "Confidential Information"
shall exclude information known to the Employee prior to the date of employment.

                  6.2 Nondisclosure. The Employee acknowledges that, except to
the extent otherwise provided below in this Section 6.2 or in Section 6.4
hereof, all Confidential Information disclosed to or acquired by the Employee is
a valuable, special, and unique asset of the Employer and is to be held in trust
by the Employee for the Employer's sole benefit. Except as otherwise provided
below in this Section 6.2 or in Section 6.4 hereof, the Employee shall not, at
any time during or after the Term, use for himself or others, or disclose or
communicate to any person for any reason, any Confidential Information without
the prior written consent of the Employer. Notwithstanding anything in this
Section 6.2 to the contrary, it is understood that, except to the extent
otherwise expressly prohibited by the Employer, (A) the Employee may disclose or
use Confidential Information in performing his duties and responsibilities to
the Employer but only to the extent required or necessary for the performance of
such duties and responsibilities in the ordinary course and within the scope of
his employment, and (B) the Employee may disclose any Confidential Information
pursuant to a request or order of any court or governmental agency, provided
that the Employee promptly notifies the Employer of any such request or order
and provides reasonable cooperation (at the Employer's expense) in the efforts,
if any, of the Employer to contest or limit the scope of such request or order.

                  6.3 Third Party Confidential Information. The Employee
acknowledges and agrees that the Employer has received, and may receive in the
future, confidential or proprietary information from third parties ("Third Party
Confidential Information") subject to a duty on the Employer's part to maintain
the confidentiality of such Third Party Confidential Information and to use it
only for certain limited purposes. During the Term and thereafter, the Employee
shall hold Third Party Confidential Information in the strictest confidence and
will not use or disclose to anyone any Third Party Confidential Information,

                                      -4-
<PAGE>

unless expressly authorized in writing by the Employer or unless otherwise
provided below in this Section 6.3 or in Section 6.4 below. Notwithstanding
anything in this Section 6.3 to the contrary, it is understood that, except to
the extent otherwise expressly prohibited by the Employer, (A) the Employee may
disclose or use Confidential Third Party Information in performing his duties
and responsibilities to the Employer but only to the extent required or
necessary for the performance of such duties and responsibilities in the
ordinary course and within the scope of his employment and (B) the Employee may
disclose any Third Party Confidential Information pursuant to a request or order
of any court or governmental agency, provided that the Employee promptly
notifies the Employer of any such request or order and provides reasonable
cooperation (at the Employer's expense) in the efforts, if any, of the Employer
to contest or limit the scope of such request or order.

                  6.4 Permitted Disclosures. The Employee's obligations under
Section 6.2 and/or Section 6.3 hereof not to use, disclose or communicate
Confidential Information or Third Party Confidential Information to any person
without the prior written consent of the Employer shall not apply to any
Confidential Information or Third Party Confidential Information which (i) is or
becomes publicly known (as demonstrated by written evidence provided by the
Employee) under circumstances involving no breach by the Employee of this
Agreement and/or (ii) was or is approved for release by the Board or an
authorized officer of the Employer.

                  6.5 Other Duties. The obligations of the Employee under this
Section 6 are without prejudice, and are in addition to, any other obligations
or duties of confidentiality, whether express or implied or imposed by
applicable law, that are owed to the Employer or any other person to whom the
Employer owes an obligation of confidentiality.

         7. No Improper Disclosure or Use of Materials. The Employee shall not
improperly use or disclose to the Employer or for the Employer's benefit any
confidential information or trade secrets of (i) any former or future employer,
(ii) any person to whom the Employee has previously provided, currently provides
or may in the future provide consulting services or (iii) any other person to
whom the Employee owes an obligation of confidentiality. The Employee shall not
bring onto the premises of the Employer any unpublished documents or any
property belonging to any person referred to in any of the foregoing clauses
(i), (ii) or (iii) unless consented to, in writing, by such person.

         8. Right to Inspect. The Employee agrees that any property situated on
the Employer's premises, including disks and other storage media, filing
cabinets or other work areas, is subject to inspection by Employer personnel at
any time with or without notice.

         9. Inventions; Assignment.

                  9.1 Definitions. For purposes of this Agreement, the term
"Assigned Inventions" shall mean any and all Inventions that (i) are made,
conceived, invented, discovered, originated, authored, created, learned or
reduced to practice by the Employee, either alone or together with others, in

                                      -5-
<PAGE>

the course of performing his duties and responsibilities hereunder or in the
course of otherwise rendering any services to the Employer (in either case,
regardless of whether or not such Inventions were made, conceived, invented,
discovered, originated, authored, created, learned or reduced to practice by the
Employee at the Employer's facilities or during regular business hours or
utilizing resources of the Employer) or (ii) arise out of or are based upon any
Confidential Information or Third Party Confidential Information. For purposes
of this Agreement, the term "Proprietary Rights" shall mean (x) any and all
rights under or in connection with any patents, patent applications, copyrights,
copyright applications, trademarks, trademark applications, service marks,
service mark applications, trade names, trade name applications, mask works,
trade secrets and/or other intellectual property rights with respect to Assigned
Inventions and (v) the goodwill associated with any and all of the rights
referred to in the foregoing clause (x).

                  9.2 Assignment Notice. The Employee hereby agrees to hold any
and all Assigned Inventions and Proprietary Rights in trust for the sole right
and benefit of the Employer and such other person or persons as the Employer
shall designate in writing, and the Employee hereby assigns to the Employer and
such other person or persons as the Employer shall designate in writing all of
his right, title and interest in and to any and all Assigned Inventions and
Proprietary Rights. The Employee agrees to give the Employer prompt written
notice of any Invention or Proprietary Right and agrees to execute such
instruments of transfer, assignment, conveyance or confirmation and such other
documents as the Employer may request to evidence, confirm or perfect the
assignment of all of the Employee's right, title and interest in and to any
Assigned Invention or Proprietary Right pursuant to the foregoing provisions of
this Section 9.2. The Employee hereby waives and quitclaims to the Employer any
and all claims of any nature whatsoever that the Employee may now or hereafter
have for infringement of any Proprietary Rights assigned hereunder to the
Employer.

                  9.3 Works Made for Hire. The Employee hereby acknowledges and
agrees that those Assigned Inventions that are original works of authorship
protectable by copyright are "works made for hire," as that term is defined in
the United States Copyright Act.

                  9.4 Duties to Assist. At the request of the Employer, the
Employee will assist the Employer in every proper way (including, without
limitation, by executing patent applications) to obtain and enforce in any
country in the world Proprietary Rights relating to any or all Assigned
Inventions. The Employee's obligation under this Section 9.4 shall continue
beyond the Term. If and to the extent that, at any time after the Term, the
Employer requests assistance from the Employee with respect to obtaining and
enforcing in any country in the world any Proprietary Rights relating to
Assigned Inventions, the Employer shall compensate the Employee at a reasonable
rate for the time and expenses actually spent by the Employee on such
assistance.

                  9.5 Power of Attorney. By this Agreement, the Employee hereby
irrevocably constitutes and appoints the Employer as his attorney-in-fact for
the purpose of executing, in the Employee's name and on his behalf, (i) such
instruments or other documents as may be necessary to evidence, confirm or

                                      -6-
<PAGE>

perfect any assignment pursuant to the provisions of this Section 9, (ii) such
instruments or other documents as may be necessary to assign, transfer or convey
any Assigned Invention to any third party to whom the Employer desires to
assign, transfer or convey any Assigned Invention or any interest therein or
(iii) such applications, certificates, instruments or documents as may be
necessary to obtain or enforce any Proprietary Rights in any country of the
world. This power of attorney is coupled with an interest on the part of the
Employer and is irrevocable.

                  9.6 Filings. Without the prior written consent of the
Employer, the Employee shall not, at any time, file any patent, trademark,
service mark, trade name or copyright application with respect to, or claiming,
any Assigned Inventions.

                  9.7 Other Duties. The obligations of the Employee under this
Section 9 are without prejudice, and are in addition to, any other obligations
or duties of the Employee, whether express or implied or imposed by applicable
law, to assign to the Employer all Assigned Inventions and all Proprietary
Rights.

         10. Agreement Not to Compete.

                  10.1 Noncompetition. In view of the unique nature of the
business of the Employer and the need of the Employer to maintain its
competitive advantage in the industry, the Employee agrees that, during the
Restricted Period (as defined in Section 10.2 below), the Employee shall not,
directly or indirectly, within the United States of America or its Territories
or Possessions or within any other country in the world in which the Employer
has conducted or is then conducting business, engage in, own an interest in
(except as a holder of no more than five percent (5%) of the shares of any
publicly traded corporation), be employed by, consult for, act as an advisor to,
or otherwise in any way participate in or become associated with, any
Competitive Business (as defined in Section 10.2 below) or any corporation,
partnership, limited liability company, business, enterprise, venture or other
person or entity that is engaged or participates in any Competitive Business
(each, a "Competitive Business Entity"), unless in each case the Employee shall
have given to the Board notice of the Employee's intention to be employed by,
consult for, act as an advisor to, or otherwise in any way participate in or
become associated with, any Competitive Business or any Competitive Business
Entity and the Board shall have approved the Employee's relationship with or
engagement in such Competitive Business or Competitive Business Entity;
provided, however, that, notwithstanding anything in the foregoing provisions of
this Section 10.1 to the contrary, the Employee may be employed by, consult for,
act as an advisor to, or otherwise participate in any way with, any person or
entity that is engaged in any Competitive Business if, but only if, the services
being rendered by the Employee to such person or entity (whether in the nature
of employment services, consulting services or otherwise) do not pertain or in
any way relate to such Competitive Business. During the Restricted Period, the
Employee also shall not solicit, or arrange to have any other person or entity
solicit, any person or entity engaged by the Employer as an employee, customer
or supplier of, or consultant or advisor to, the Employer to terminate such
party's relationship with the Employer.

                                      -7-
<PAGE>

                  10.2 Definitions. For purposes of this Section 10, the
following terms shall have the meanings provided therefor below:

                           (a) "Competitive Business" shall mean any business
         that is engaged in a business in competition with the activities of the
         Company as they may exist from time to time.

                           (b) "Restricted Period" shall mean the period
         commencing on the date of this Agreement and ending on the first
         anniversary of the effective date of the termination of the Employee's
         employment with the Employer unless: (a) Employer terminates the
         employment of the Employee under this Agreement without Cause or (b)
         Employee terminates employment with Good Reason, in which case "
         Restricted Period" shall mean the period commencing on the date of this
         Agreement and ending on the date the Employee ceases being entitled to
         receive Salary pursuant to the provisions of Section 5.3(a).

                  10.3 Time Periods; Divisibility. The time periods provided for
in this Section 10 shall be extended for a period of time equal to any period of
time in which the Employee shall be in violation of any provision of this
Section 10 and any period of time required for litigation to enforce the
provisions of this Section 10. If at any time the provisions of this Section 10
shall be determined to be invalid or unenforceable, by reason of being vague or
unreasonable as to area, duration or scope of activity, this Section 10 shall be
considered divisible and shall become and be automatically amended to apply only
to such area, duration and scope of activity as shall be determined to be
reasonable by the court or other body having jurisdiction over the matter; and
the Employee agrees that this Section 10, as so amended, shall be valid and
binding as though any invalid or unenforceable provision had not been included
herein.

         11. Return of Documents. Employee will promptly deliver to the
Employer, upon the termination of the Employee's employment with the Employer
or, if earlier, upon the request of the Employer, all documents and other
tangible media (including all originals, copies, reproductions, digests,
abstracts, summaries, analyses, notes, notebooks, drawings, manuals, memoranda,
records, reports, plans, specifications, devices, formulas, storage media,
including software, and computer printouts) in the Employee's actual or
constructive possession or control that contain, reflect, disclose or relate to
any Confidential Information, Third Party Confidential Information, Assigned
Inventions or Proprietary Rights. The Employee will destroy any related computer
entries on equipment or media not owned by the Employer.

         12. No Use of Name, Etc. Without the prior written consent of the
Employer, the Employee shall not, at any time (including, without limitation, at
any time after the termination of the Employee's employment with the Employer),
use, for himself or on behalf of any other person, any name that is identical or
similar to or likely to be confused with the name of the Employer or the name of
any product or service produced or provided by the Employer, provided that the
Employee prior to termination may use the Employer's name in performing his or
her duties and responsibilities to the Employer but only to the extent required
or necessary for the performance of such duties and responsibilities in the

                                      -8-
<PAGE>

ordinary course and within the scope of his employment. Without the prior
written consent of the Employer, the Employee shall not, at any time after the
termination of the Employee's employment with the Employer, directly or
indirectly represent himself, whether on his behalf or on behalf of any other
person, as then being in any way connected or associated with the Employer.

         13. No Conflicting Obligation. Employee represents that he is free to
enter into this Agreement and that his performance of all of the terms of this
Agreement and of all of his duties and responsibilities as an employee of the
Employer do not and will not breach (i) any agreement to keep in confidence
information acquired by the Employee in confidence or in trust, (ii) any
agreement to assign to any third party inventions made by the Employee and/or
(iii) any agreement not to compete against the business of any third party.
Employee further represents that he has not made and will not make any
agreements in conflict with this Agreement.

         14. Indemnification. The Employer agrees to indemnify, defend and hold
harmless the Employee and his respective successors, heirs and assigns
("Indemnitees") against any liability, damage, loss or expense (including
reasonable attorneys' fees and expenses of litigation) incurred by or imposed
upon the Indemnitees or any of them in connection with any claims, suits,
actions, demands or judgments arising from the good faith performance by the
Employee of his duties and responsibilities hereunder.

         15. Unique Nature of Agreement; Specific Enforcement. The Employer and
the Employee agree and acknowledge that the rights and obligations set forth in
this Agreement are of a unique and special nature and that the Employer is,
therefore, without an adequate legal remedy in the event of the Employee's
violation of any of the covenants set forth in this Agreement. The Employer and
the Employee agree, therefore, that, in addition to all other rights and
remedies, at law or in equity or otherwise, that may be available to the
Employer, each of the covenants made by the Employee under this Agreement shall
be specifically enforceable in equity.

         16. Survival. The provisions of Sections 6, 7, 9, 10, 12 and 14 shall
survive the termination of this Agreement.

         17. Miscellaneous.

                  17.1 Entire Agreement. This Agreement represents the entire
agreement of the parties with respect to the arrangements contemplated hereby.
No prior agreement, whether written or oral, shall be construed to change,
amend, alter, repeal or invalidate this Agreement. This Agreement may be amended
only by a written instrument executed in one or more counterparts by the
parties.

                  17.2 Waiver. No consent to or waiver of any breach or default
in the performance of any obligations hereunder shall be deemed or construed to
be a consent to or waiver of any other breach or default in the performance of
any of the same or any other obligations hereunder. Failure on the part of
either party to complain of any act or failure to act of the other party or to
declare the other party in default, irrespective of the duration of such

                                      -9-
<PAGE>

failure, shall not constitute a waiver of rights hereunder and no waiver
hereunder shall be effective unless it is in writing, executed by the party
waiving the breach or default hereunder.

                  17.3 Assignment. This Agreement shall be binding upon and
inure to the benefit of the parties hereto and their respective successors and
permitted assigns. This Agreement may be assigned by the Employer to any
Affiliate of the Employer and to a successor of its business to which this
Agreement relates (whether by purchase or otherwise). "Affiliate of the
Employer" means any person which, directly or indirectly, controls or is
controlled by or is under common control with the Employer and, for the purposes
of this definition, "control" (including the terms "controlled by" and "under
common control with") shall mean the possession, directly or indirectly, of the
power to direct or cause the direction of the management and policies of another
whether through the ownership of voting securities or holding of office in
another, by contract or otherwise. The Employee may not assign or transfer any
or all of his rights or obligations under this Agreement.

                  17.4 Arbitration.

                           (a) Disputes to be Arbitrated Any controversy, claim,
         or dispute arising out of or relating to this Agreement, including its
         formation, validity, or breach thereof, whether arising during or after
         the period of this Agreement, shall be settled by arbitration in
         accordance with the rules of the American Arbitration Association, and
         the decision of the arbitrator shall be final and binding upon the
         parties. Nothing in this paragraph, however, shall prevent the parties
         from seeking injunctive relief from a state or federal court of
         competent jurisdiction.

                           (b) Arbitration Procedure The arbitration shall be
         conducted by one neutral arbitrator, who shall be selected in
         accordance with the rules of the American Arbitration Association. The
         arbitration shall take place in Boston, Massachusetts. The arbitrator
         shall issue a written decision and set forth the reasons for said
         decision. Judgment upon the award rendered by the arbitrator may be
         entered in any federal or state court having competent jurisdiction
         thereof. The costs of arbitration, including the fees of the
         arbitrator, shall be borne equally. Each side shall bear its own
         attorney's fees and costs, and punitive damages shall not be allowed.

                  17.5 Severability. All headings and subdivisions of this
Agreement are for reference only and shall not affect its interpretation. In the
event that any provision of this Agreement should be held unenforceable by a
court of competent jurisdiction, such court is hereby authorized to amend such
provision so as to be enforceable to the fullest extent permitted by law, and
all remaining provisions shall continue in full force without being impaired or
invalidated in any way.

                  17.6 Governing Law. This Agreement shall be governed by and
construed in accordance with the laws of The Commonwealth of Massachusetts,
excluding choice of law rules thereof.

                                      -10-
<PAGE>

         IN WITNESS WHEREOF, the parties have signed this agreement as of the
date written above as a sealed instrument.
                                            SAFESCIENCE, INC.

                                            By:      /s/ Illegible
                                                     -------------
                                                     Name:
                                                     Title:

                                            /s/ Bradley J. Carver
                                            ---------------------
                                            Name:  Bradley J. Carver

                                      -11-

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