RESTRUCTURING AGREEMENT

     RESTRUCTURING AGREEMENT (the "Agreement"), dated as of January 10, 2008, by
and between GS CleanTech  Corporation,  a Delaware  corporation (the "Company"),
and YA Global Investments, L.P. (f/k/a Cornell Capital Partners, L.P.), a Cayman
Islands exempt limited partnership (the "Buyer")

A.   As of the date  hereof  the Buyer is the holder or lender  pursuant  to the
     following convertible debentures or convertible notes:


- ------------------- ------------------------- --------------- ------------------- ---------------- -------------------
Identifier          Original Issuance Date    Original        Current  Principal  Accrued     and  Aggregate
                                              Principal       Balance             unpaid Interest  Principal   Amount
                                              Balance                                              of   Amended   and
                                                                                                   Restated
                                                                                                   Debentures
- ------------------- ------------------------- --------------- ------------------- ---------------- -------------------
                                                                                    
Debenture 1         February 8, 2006          $1,900,000      $1,900,000          $184,986         $2,084,986
- ------------------- ------------------------- --------------- ------------------- ---------------- -------------------
Debenture 2         April 13, 2006            $4,400,000      $2,400,000(*)       $389,277         $2,789,277(*)
- ------------------- ------------------------- --------------- ------------------- ---------------- -------------------
Debenture 3         February 27, 2007         $1,125,000      $1,125,000          $99,062          $1,224,062
- ------------------- ------------------------- --------------- ------------------- ---------------- -------------------
Convertible Note    March 31, 2004            $2,190,410      $617,510            $118,105         $735,615
- ------------------- ------------------------- --------------- ------------------- ---------------- -------------------



Debenture  1,  Debenture  2,  Debenture  3, and the  Convertible  Note  shall be
collectively  referred  to herein as the  "Existing  Debentures."  The  Existing
Debentures were issued pursuant to those certain securities  purchase agreements
and other related agreements listed on Schedule 1 attached hereto (collectively,
the "Transaction Documents").

B.   In connection with the execution and delivery of a letter agreement,  dated
     as of November 9, 2007 (the "Letter of Intent"), by and between the Company
     and the Buyer,  the parties  agreed in  principal  to amend and restate the
     Existing  Debentures  and certain  other  agreements  all of which shall be
     contained in this Agreement;

C.   The obligations of the Company under the Existing Debentures are secured by
     certain  existing  security  agreements,  pledge  agreements,  and guaranty
     agreements (collectively,  the "Prior Security Documents"), and the parties
     desire  that the  obligation  be further  secured  by the  Global  Security
     Agreement among the Company, the Buyer, and other parties dated on or about
     the date hereof (the  "Security  Agreement"),  the Global Pledge  Agreement
     among the Company,  the Buyer, and other parties dated on or about the date
     hereof (the "Pledge Agreement"), the Global IP Security Agreement among the
     Company,  the Buyer,  and other  parties  dated on or about the date hereof
     (the "IP  Security  Agreement")  the Global  Guaranty  Agreement  among the
     Company,  the Buyer,  and other  parties  dated on or about the date hereof
     (the "Guaranty Agreement" and along with the Security Agreement, the Pledge
     Agreement, and the Prior Security Documents, the IP Security Agreement, any
     mortgages granted to the Buyer, and all other documents,  instruments,  and
     agreements  granted to the Lender to secure the  obligations of the Company
     to the Buyer, the "Security Documents");

D.   The Company and the Buyer desire to enter into this Agreement,  pursuant to
     which,  among other  things,  (i) the Company and the Buyer shall amend and
     restate all of the Existing  Debentures  each for a new  debentures  in the
     form  attached  hereto as Exhibit A in the aggregate  principal  amount set
     forth on the table above (the  "Amended  and Restated  Debentures"),  which
     shall be convertible into Common Stock;

E.   The amendment and  restatement  of the Existing  Debentures for the Amended
     and Restated  Debentures are being made in reliance upon the exemption from
     registration provided by Section 3(a)(9) of the 1933 Act.

F.   Capitalized  terms used herein and not otherwise  defined herein shall have
     the  respective  meanings  ascribed  to them in the  Amended  and  Restated
     Debentures.

     NOW,  THEREFORE,  in consideration of the foregoing recitals and the mutual
promises  hereinafter  set forth,  the  Company  and the Buyer  hereby  agree as
follows:

1.   AMENDMENT AND RESTATEMENT OF EXISTING DEBENTURES AND EXISTING WARRANTS.

     (a)  Amendment  and   Restatement  of  Existing   Debentures  and  Existing
          Warrants.  Subject to  satisfaction  (or waiver) of the conditions set
          forth  herein,  at the closing  contemplated  by this  Agreement  (the
          "Closing"),  the Buyer shall  surrender  to the  Company its  Existing
          Debentures  and the  Company  shall issue and deliver to the Buyer (i)
          the Amended and Restated  Debentures in the aggregate principal amount
          set forth in the table above.

     (b)  Closing Date.  The date and time of the Closing (the  "Closing  Date")
          shall  be 10:00  a.m.,  Eastern  Standard  Time,  on the date  hereof,
          subject to notification of satisfaction  (or waiver) of the conditions
          to the  Closing  set forth  herein  (or such other time and date as is
          mutually  agreed to by the Company and the Buyer).  The Closing  shall
          occur on the  Closing  Date at the  offices  of the  Buyer (or at such
          other location as is mutually agreed to by the Company and the Buyer).

     (c)  Delivery.  On the Closing Date, the Company shall deliver to the Buyer
          the Amended and  Restated  Debentures  duly  executed on behalf of the
          Company and registered in the name of the Buyer.

2.   AGREEMENTS OF THE PARTIES.

     (a)  Full Force and Effect.  Except as otherwise expressly provided herein,
          effective as of the Closing Date,  the  Transaction  Documents and the
          Prior Security  Documents are, and shall continue to be, in full force
          and effect, except for amendments set forth herein.

     (b)  Reaffirmation of Security.  The Company hereby acknowledges,  confirms
          and  agrees  that  Buyer  has  and  shall   continue  to  have  valid,
          enforceable and perfected liens upon and security interests heretofore
          granted  pursuant  to any and  all of the  Prior  Security  Documents.
          Furthermore,  the  Company  agrees  that the  security  interests  and
          guaranties  granted pursuant to the Security  Agreement,  the Guaranty
          Agreement,  the IP Security  Agreement,  any mortgages  granted to the
          Buyer, and the Pledge  Agreement,  are intended to be supplemental to,
          and  not  in  limitation  of,  the  existing  security   interests  or
          guaranties  granted  to the Buyer to secure the  Obligations,  whether
          under the Prior Security Documents or otherwise.

     (c)  All amounts owed, together with interest accrued and accruing thereon,
          and  fees,  costs,  expenses  and  other  charges  (collectively,  the
          "Obligations")  now or  hereafter  payable by the Company to the Buyer
          (including,  without  limitation,  the amounts referenced in the table
          above)  under  the  Existing  Debentures  and  all  other  agreements,
          contracts,   instruments  or  other  items   delivered  in  connection
          therewith are unconditionally  owing by the Company to Buyer,  without
          offset,  setoff,  defense  or  counterclaim  of any  kind,  nature  or
          description whatsoever.

     (d)  Effective as of the Closing Date, the  Registration  Rights  Agreement
          shall be terminated in its entirety and of no further force or effect,
          and the Buyer  expressly  releases the Company from any past or future
          obligations or liabilities thereunder. With a view to making available
          to the Buyer the benefits of Rule 144 promulgated under the Securities
          Act or any similar rule or  regulation of the SEC that may at any time
          permit  the Buyer to sell  securities  of the  Company  to the  public
          without  registration ("Rule 144"), the Company represents,  warrants,
          and   covenants   that  the  Company  is  subject  to  the   reporting
          requirements  of section 13 or 15(d) of the Exchange Act and has filed
          all  required  reports  under  section 13 or 15(d) of the Exchange Act
          during the 12 months  prior to the date  hereof  (or for such  shorter
          period that the issuer was required to file such reports),  other than
          Form  8-K  reports  and  that  from  the  date  hereof  until  all the
          Securities  either have been sold by the Buyer,  or may permanently be
          sold by the Buyer without any restrictions  pursuant to Rule 144, (the
          "Registration Period") the Company shall file with the SEC in a timely
          manner all required  reports under section 13 or 15(d) of the Exchange
          Act and such reports shall conform to the  requirement of the Exchange
          Act and the SEC for filing thereunder.

     (e)  On the date hereof,  $2,000,000  of the principal  amount  outstanding
          under  Debenture 2 shall be reduced by the  debenture in the principal
          amount of $2,000,000  issued by GS  EnviroServices to the Buyer as set
          forth in the Securities  Purchase  Agreement between GS EnviroServices
          and the Buyer of even date herewith.

3. REPRESENTATIONS AND WARRANTIES

     (a)  Buyer  Representations  and  Warranties.   The  Buyer  represents  and
          warrants as of the date hereof to the Company that:

          (i)  Investment  Purpose.  The  Buyer is  acquiring  the  Amended  and
               Restated  Debentures  and,  upon  conversion  of the  Amended and
               Restated Debentures, the Buyer will acquire the conversion shares
               then issuable,  for its own account for  investment  only and not
               with a view towards, or for resale in connection with, the public
               sale or distribution thereof, except pursuant to sales registered
               or exempted under the Securities Act; provided,  however, that by
               making the  representations  herein, the Buyer reserves the right
               to dispose  of the  conversion  shares at any time in  accordance
               with or pursuant to an effective  registration statement covering
               such shares or an available exemption under the Securities Act.

          (ii) Accredited Investor Status. The Buyer is an "Accredited Investor"
               as that term is defined in Rule 501(a)(3) of Regulation D.

          (iii) Reliance on Exemptions.  The Buyer  understands that the Amended
               and  Restated  Debentures  are  being  offered  and sold to it in
               reliance   on   specific   exemptions   from   the   registration
               requirements  of United States  federal and state  securities law
               and that the  Company  is  relying  in part  upon the  truth  and
               accuracy   of,   and   the   Buyer's    compliance    with,   the
               representations,  warranties, agreements,  acknowledgements,  and
               understanding of the Buyer set forth herein in order to determine
               the  availability  of such  exemptions and the eligibility of the
               Buyer to acquire such securities.

          (iv) Transfer or Resale.  The Buyer  understands that: (i) the Amended
               and Restated  Debentures and the  conversions  shares  thereunder
               have not been and are not being  registered  under the Securities
               Act or any state  securities  laws,  and may not be  offered  for
               sale,  sold,  assigned  or  transferred  unless (A)  subsequently
               registered thereunder,  (B) the Buyer shall have delivered to the
               Company an opinion of counsel, in a generally acceptable form, to
               the effect that such shares to be sold,  assigned or  transferred
               may be sold,  assigned or  transferred  pursuant to an  exemption
               from such registration  requirements,  or (C) such Buyer provides
               the Company with reasonable assurances (in the form of seller and
               broker representation  letters) that such Securities can be sold,
               assigned or transferred  pursuant to Rule 144  promulgated  under
               the  Securities  Act, as amended (or a  successor  rule  thereto)
               (collectively, "Rule 144"), in each case following the applicable
               holding period set forth therein;  (ii) any sale of the ---------
               Securities  made  in  reliance  on Rule  144 may be made  only in
               accordance with the terms of Rule 144 and further, if Rule 144 is
               not applicable,  any resale of the Securities under circumstances
               in which the seller (or the person through whom the sale is made)
               may be deemed to be an  underwriter  (as that term is  defined in
               the  Securities  Act) may  require  compliance  with  some  other
               exemption  under the Securities Act or the rules and  regulations
               of the SEC  thereunder;  and (iii)  neither  the  Company nor any
               other person is under any  obligation to register the  Securities
               under  the  Securities  Act or any  state  securities  laws or to
               comply with the terms and conditions of any exemption thereunder.

          (v)  Legends.  The Buyer  understands  that the  certificates or other
               instruments  representing the the Amended and Restated Debentures
               and the conversions  shares  thereunder  shall bear a restrictive
               legend in  substantially  the following form (and a stop transfer
               order may be placed against transfer of such stock certificates):

                    THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN
                    REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED,  OR
                    APPLICABLE  STATE  SECURITIES LAWS. THE SECURITIES HAVE BEEN
                    ACQUIRED SOLELY FOR INVESTMENT  PURPOSES AND NOT WITH A VIEW
                    TOWARD  RESALE  AND  MAY  NOT BE  OFFERED  FOR  SALE,  SOLD,
                    TRANSFERRED  OR  ASSIGNED  IN THE  ABSENCE  OF AN  EFFECTIVE
                    REGISTRATION   STATEMENT  FOR  THE   SECURITIES   UNDER  THE
                    SECURITIES  ACT OF 1933,  AS AMENDED,  OR  APPLICABLE  STATE
                    SECURITIES  LAWS,  OR AN OPINION OF COUNSEL,  IN A GENERALLY
                    ACCEPTABLE  FORM,  THAT  REGISTRATION  IS NOT REQUIRED UNDER
                    SAID ACT OR APPLICABLE STATE SECURITIES LAWS.

               The  legend set forth  above  shall be  removed  and the  Company
               within two (2) business  days shall issue a  certificate  without
               such legend to the holder of the Amended and Restated  Debentures
               or the  conversions  shares  thereunder upon which it is stamped,
               if, unless  otherwise  required by state  securities laws, (A) in
               connection  with  a sale  transaction,  provided  the  conversion
               shares  are  registered  under  the  Securities  Act  or  (B)  in
               connection  with a sale  transaction,  after such holder provides
               the Company with an opinion of counsel, which opinion shall be in
               form,  substance  and scope  customary for opinions of counsel in
               comparable  transactions,  to  the  effect  that a  public  sale,
               assignment  or  transfer  of the  conversion  shares  may be made
               without registration under the Securities Act.

          (vi) Authorization,  Enforcement.  This  Agreement  has been  duly and
               validly authorized,  executed and delivered by the Buyer and is a
               valid  and  binding   agreement  of  the  Buyer   enforceable  in
               accordance with its terms,  except as such  enforceability may be
               limited by general principles of equity or applicable bankruptcy,
               insolvency,  reorganization,  moratorium,  liquidation, and other
               similar laws relating to, or affecting generally, the enforcement
               of applicable creditors' rights and remedies.

     (b)  Company  Representations  and Warranties.  The Company  represents and
          warrants as of the date hereof to the Buyer that:

          (i)  Organization and Qualification. The Company is a corporation duly
               organized,  validly  existing and in good standing under the laws
               of Delaware,  and has the  requisite  corporate  power to own its
               properties  and to carry on its business as now being  conducted.
               The  Company is duly  qualified  as a foreign  corporation  to do
               business and is in good standing in every  jurisdiction  in which
               the  nature  of  the   business   conducted   by  it  makes  such
               qualification necessary, except to the extent that the failure to
               be so qualified or be in good standing  would not have a material
               adverse effect on the Company taken as a whole.

          (ii) Authorization,  Enforcement,  Compliance with Other  Instruments.
               (A) The Company has the requisite  corporate  power and authority
               to  enter  into and  perform  this  Agreement,  the  Amended  and
               Restated  Debentures  and any  related  agreements  executed  and
               delivered  pursuant hereto or thereto and to issue the conversion
               shares in  accordance  with the terms of the Amended and Restated
               Debentures,  (B) the execution and delivery of this  Agreement by
               the  Company  and  the  consummation  by it of  the  transactions
               contemplated hereby, including,  without limitation, the issuance
               of the Amended and Restated  Debentures have been duly authorized
               by the  Company's  Board of Direction  and no further  consent or
               authorization is required by the Company,  its Board of Directors
               or its  stockholders  and  (C)  each of  this  Agreement  and the
               Amended and Restated Debentures constitutes the valid and binding
               obligation  of the  Company  enforceable  against  the Company in
               accordance with its terms,  except as such  enforceability may be
               limited by general principles of equity or applicable bankruptcy,
               insolvency,  reorganization,  moratorium,  liquidation or similar
               laws  relating to, or affecting  generally,  the  enforcement  of
               creditors' rights and remedies.

          (iii) Issuance of  Securities.  The  conversion  shares  issuable upon
               conversion of the Amended and Restated  Debentures have been duly
               authorized and reserved for issuance. Upon conversion or exercise
               in  accordance  with the Amended  and  Restated  Debentures,  the
               conversion   shares   will  be  duly   issued,   fully  paid  and
               nonassessable.

          (iv) No General  Solicitation.  Neither  the  Company,  nor any of its
               affiliates,  nor any person  acting on its or their  behalf,  has
               engaged   in  any  form  of  general   solicitation   or  general
               advertising  (within  the  meaning  of  Regulation  D  under  the
               Securities  Act) in  connection  with  the  offer  or sale of the
               Amended and Restated Debentures.

     (c)  For the  purposes  of Rule  144,  the  Company  acknowledges  that the
          holding period of the Amended and Restated  Debentures  (including the
          underlying conversion shares) may be tacked onto the holding period of
          the Existing Debentures, and the Company agrees not to take a position
          contrary to this  Section  3(c).  The  Company's  acknowledgement  and
          agreement  set forth in this  Section  3(c)  shall be  subject  in all
          respects to Rule 144 and other  applicable  securities laws, as may be
          in effect from time to time.

4.       CERTAIN COVENANTS AND AGREEMENTS.

     (a)  The Buyer hereby consents to the following actions taken by or planned
          to be taken by the Company and/or its affiliates:

          (i)  The   contribution   to  the  Company's   capital  by  GreenShift
               Corporation ("GSHF"),  the Company's former majority shareholder,
               of  GSHF's  stakes  in GS  AgriFuels  Corporation  and GS  Energy
               Corporation,  provided that in connection with such contribution,
               the Company  adds the shares of GS AgriFuels  Corporation  and GS
               Energy  Corporation  to the shares  pledged by the Company to the
               Buyer pursuant to the Pledge Agreement;

          (ii) The  distribution  by GSHF of  1,000,000,000  common shares of GS
               Energy and 2,000,000 common shares of GS EnviroServices,  Inc. to
               GSHF  minority  shareholders,  and GSHF's entire 80% stake in the
               Company to all of its shareholders on a pro-rata basis;

          (iii) The cancellation by the Company of its previously planned merger
               with GSHF;

          (iv) The  cancellation  of the  previously  planned merger between the
               Company's subsidiaries, GS AgriFuels and GS Energy;

          (v)  The  filing  of  an  amendment  to  the  Company's   Articles  of
               Incorporation,   changing  the  Company's   name  to  "GreenShift
               Corporation,"  provided that the Company  provides the Buyer with
               thirty days advanced written notice.  The Company herein confirms
               that  the  Buyer  shall  have  the  authority  to  amend  any UCC
               financing statements to reflect the Company's change of name.

          (vi) The filing of an amendment to the Articles of Incorporation of GS
               Energy,  reverse  splitting  its  stock on a 1 for 500  basis and
               changing its name to "GS  EcoSystem  Corporation,"  provided that
               the GS  Energy  provides  the Buyer  with  thirty  days  advanced
               written  notice.  GS Energy herein  confirms that the Buyer shall
               have the  authority  to amend  any UCC  financing  statements  to
               reflect GS Energy's change of name. ; and,

          (vii) The transfer of the  Company's  interest in the capital stock of
               GS AgriFuels  to a new  wholly-owned  subsidiary  of the Company,
               which  subsidiary  will then merge GS  AgriFuels  into  itself in
               accordance  with the  short-form  merger  procedures  provided in
               Section 253 of the Delaware  General  Corporation Law and take GS
               AgriFuels  private  on the  basis of the  terms of the  terms and
               conditions  of  that  certain  "[Go  Private  Agreement]"  by and
               between the Company and Buyer.

     (b)  The Buyer  consents to the Company  effectuating a split of its common
          stock on a 1 for 50 basis ("Reverse Split").  The Amended and Restated
          Debentures  shall be issued with a conversion  price that reflects the
          Reverse Split.

     (c)  The Buyer  hereby  consents  to the  creation  by the Company of a new
          wholly owned subsidiary to be named "________________" (the "New Sub")
          and  organized  in  Delaware,  provided  that  New  Sub  sign  on as a
          "Grantor"  under  the  Security  Agreement,  a  "Guarantor"  under the
          Guaranty Agreement, and a "Guarantor" under the IP Security Agreement.
          Furthermore,  the Company  expressly agrees that all its shares in the
          New Sub  shall  be  included  as part of the  Pledged  Collateral  (as
          defined in the Pledge  Agreement)  and shall  promptly  delivers  into
          escrow  such  Transfer   Documents  as  provided  for  in  the  Pledge
          Agreement.

     (d)  Debenture 1 was  originally  issued by GreenShift  Corporation  to the
          Buyer  and  subsequently  assigned  to  and  assumed  by  the  Company
          effective as of July 1, 2006 as evidenced by the assignment agreement,
          a copy of which is set forth on Exhibit B.

5.  MISCELLANEOUS.

     (a)  Governing Law. This Agreement  shall be governed by and interpreted in
          accordance  with the laws of the State of New Jersey without regard to
          its principles of conflict of laws. The parties further agree that any
          action between them shall be heard in Hudson County,  New Jersey,  and
          expressly  consent to the jurisdiction and venue of the Superior Court
          of New Jersey, sitting in Hudson County and the United States District
          Court for the District of New Jersey sitting in Newark, New Jersey for
          the  adjudication  of any  civil  action  asserted  pursuant  to  this
          Agreement.

     (b)  Counterparts.  This Agreement may be executed in two or more identical
          counterparts,  each of  which  shall  be  considered  one and the same
          agreement  and shall  become  effective  when  counterparts  have been
          signed by each party and  delivered to the other  party.  In the event
          any signature page is delivered by facsimile  transmission,  the party
          using such means of delivery shall cause four (4) additional  original
          executed signature pages to be physically delivered to the other party
          within five (5) days of the execution and delivery thereof.

     (c)  Headings.  The  headings  of this  Agreement  are for  convenience  of
          reference and shall not form part of, or affect the interpretation of,
          this Agreement.

     (d)  Severability.  If any provision of this Agreement  shall be invalid or
          unenforceable in any jurisdiction, such invalidity or unenforceability
          shall not affect the validity or  enforceability  of the  remainder of
          this Agreement in that  jurisdiction or the validity or enforceability
          of any provision of this Agreement in any other jurisdiction.

     (e)  No Third Party  Beneficiaries.  This  Agreement  is  intended  for the
          benefit  of  the  parties  hereto  and  their   respective   permitted
          successors  and  assigns,  and is not for the  benefit of, nor may any
          provision hereof be enforced by, any other Person.

     (f)  Further  Assurances.  Each party shall do and perform,  or cause to be
          done and  performed,  all such  further  acts and  things,  and  shall
          execute  and  deliver   all  such  other   agreements,   certificates,
          instruments and documents,  as the other party may reasonably  request
          in order to carry out the intent and  accomplish  the purposes of this
          Agreement  and  the  consummation  of  the  transactions  contemplated
          hereby.

     (g)  No Strict  Construction.  The language used in this  Agreement will be
          deemed to be the  language  chosen by the  parties  to  express  their
          mutual  intent,  and no rules of strict  construction  will be applied
          against any party.

     (h)  Entire  Agreement;  Effect  on  Prior  Agreements;   Amendments.  This
          Agreement  supersedes  all  other  prior  oral or  written  agreements
          between  the Buyer and the  Company  with  respect to the  matters set
          forth herein, and this Agreement and the instruments referenced herein
          contain the entire  understanding  of the parties  with respect to the
          matters covered herein and,  except as specifically  set forth herein,
          neither the Company nor the Buyer makes any representation,  warranty,
          covenant or undertaking with respect to such matters.  No provision of
          this Agreement may be waived or amended other than by an instrument in
          writing signed by the party charged with enforcement.

     (i)  Notices.  Any  notices,  consents,  waivers  or  other  communications
          required or  permitted  to be given under the terms of this  Agreement
          must be in writing and will be deemed to have been delivered: (i) upon
          receipt,  when delivered  personally;  (ii) upon receipt, when sent by
          facsimile  (provided  confirmation  of transmission is mechanically or
          electronically  generated and kept on file by the sending  party);  or
          (iii) one (1)  Business Day after  deposit  with an overnight  courier
          service,  in each case properly  addressed to the party to receive the
          same.  The  addresses and  facsimile  numbers for such  communications
          shall be:

                           If to the Company:

                                   GS CleanTech Corporation
                                   One Penn Plaza, Suite 1612
                                   New York, New York 10119
                                   Attn: Kevin Kreisler. Chief Executive Officer
                                   Telephone:  (212) 994-5374
                                   Facsimile:  (646) 572-6336

                           If to the Buyer:

                                    YA Global Investments, L.P.
                                    101 Hudson Street
                                    Suite 3700
                                    Jersey City, NJ 07303
                                    Telephone:       (201) 985-8300
                                    Facsimile:       (201) 985-8266
                                    Attention:       Mark Angelo

                           With a copy to:

                                   Troy Rillo, Esq.
                                   101 Hudson Street
                                   Suite 3700
                                   Jersey City, NJ 07303
                                   Telephone:        (202) 985-8300

          or to  such  other  address  and/or  facsimile  number  and/or  to the
          attention of such other Person as the recipient party has specified by
          written  notice given to each other party five (5) Business Days prior
          to the effectiveness of such change.

     (j)  Successors and Assigns. This Agreement shall be binding upon and inure
          to the  benefit of the  parties and their  respective  successors  and
          assigns.

     (k)  Survival.  Unless this  Agreement is  terminated  under Section 7, the
          representations  and warranties of the Company and the Buyer contained
          herein and the agreements and covenants set forth herein shall survive
          the Closing.

                            [Signature Page Follows]









     IN WITNESS WHEREOF,  the Buyer and the Company have caused their respective
signature  page to this  Agreement  to be duly  executed  as of the  date  first
written above.



                                      COMPANY:

                                      GS CLEANTECH CORPORATION


                                      By:  /s/ Kevin Kreisler
                                          ------------------------
                                      Name:    Kevin Kreisler
                                      Title:   President
                                               GS ENERGY



                                      By:  /s/ Kevin Kreisler
                                          ------------------------
                                      Name:    Kevin Kreisler
                                      Title:   President




                                      BUYER:

                                      YA GLOBAL INVESTMENTS, L.P.



                                      By:  Yorkville Advisors, LLC,
                                            its Investment Manager

                                      By:  /s/ Troy Rillo
                                          -------------------------
                                      Name:    Troy Rillo
                                      Title:   Senior Managing Director



- --------
*    Note - Principal  balance of  Debenture 2 is reduced by  $2,000,000  as set
     forth in Section 2(e).