Document:

Exhibit 10.2

   

  INVESTMENT
        MANAGEMENT TRUST AGREEMENT

   

  This Investment Management Trust Agreement (this
    “Agreement”) is made effective as of February [__], 2021 by and between Sustainable Development Acquisition
    I Corp., a Delaware public benefit corporation (the “Company”), and Continental Stock Transfer &
    Trust Company, a New York limited purpose trust company (the “Trustee”).

   

  WHEREAS, the Company’s registration statement
    on Form S-1, File No. 333-[______] ( the “Registration Statement”) and prospectus (the “Prospectus”)
    for the initial public offering of the Company’s units (the “Units”), each of which consists of
    one share of the Company’s Class A common stock, par value $0.0001 per share (the “Common Stock”),
    and one-half of one redeemable warrant, each whole warrant entitling the holder thereof to purchase one share of Common Stock (such
    initial public offering hereinafter referred to as the “Offering”), has been declared effective as of
    the date hereof by the U.S. Securities and Exchange Commission;

   

  WHEREAS, the Company has entered into an Underwriting
    Agreement (the “Underwriting Agreement”) with Barclays Capital Inc. and BofA Securities, Inc., as representatives
    (the “Representatives”) of the several underwriters (the “Underwriters”) named
    therein;

   

  WHEREAS, as described in the Prospectus, $250,000,000
    of the proceeds of the Offering and sale of the Private Placement Warrants (as defined in the Underwriting Agreement) (or $287,500,000,
    if the Underwriters’ over-allotment option is exercised in full) will be delivered to the Trustee to be deposited and held
    in a segregated trust account located at all times in the United States (the “Trust Account”) for the
    benefit of the Company and the holders of the Common Stock included in the Units issued in the Offering as hereinafter provided
    (the amount to be delivered to the Trustee (and any interest subsequently earned thereon) is referred to herein as the “Property,”
    the stockholders for whose benefit the Trustee shall hold the Property will be referred to as the “Public Stockholders,”
    and the Public Stockholders and the Company will be referred to together as the “Beneficiaries”);

   

  WHEREAS, pursuant to the Underwriting Agreement,
    a portion of the Property equal to $8,312,500, or $9,559,375 if the Underwriters’ over-allotment option is exercised in full,
    is attributable to deferred underwriting discounts and commissions that will be payable by the Company to the Underwriters upon
    and concurrently with the consummation of the Business Combination (as defined below) (the “Deferred Discount”);
    and

   

  WHEREAS, the Company and the Trustee desire
    to enter into this Agreement to set forth the terms and conditions pursuant to which the Trustee shall hold the Property.

   

  NOW THEREFORE, IT IS AGREED:

   

  1. Agreements and Covenants of Trustee.
    The Trustee hereby agrees and covenants to:

   

  (a) Hold the Property in trust for the Beneficiaries
    in accordance with the terms of this Agreement in the Trust Account established by the Trustee in the United States at J.P. Morgan
    Chase Bank, N.A., (or at another U.S.-chartered commercial bank with consolidated assets of $100 billion or more) in the United
    States, maintained by the Trustee and at a brokerage institution selected by the Trustee that is reasonably satisfactory to the
    Company;

   

  (b) Manage, supervise and administer the Trust
    Account subject to the terms and conditions set forth herein;

   

  (c) In a timely manner, upon the written instruction
    of the Company, invest and reinvest the Property solely in United States government securities within the meaning of Section 2(a)(16)
    of the Investment Company Act of 1940, as amended, having a maturity of 185 days or less, or in money market funds meeting the
    conditions of paragraphs (d)(1), (d)(2), (d)(3) and (d)(4) of Rule 2a-7 promulgated under the Investment Company Act of 1940, as
    amended (or any successor rule), which invest only in direct U.S. government treasury obligations, as determined by the Company;
    it being understood that the Trust Account will earn no interest while account funds are uninvested awaiting the Company’s
    instructions hereunder and the Trustee may earn bank credits or other consideration;

   

  
  
     

  

  
     

  

  
   

  (d) Collect and receive, when due, all principal,
    interest or other income arising from the Property, which shall become part of the “Property,” as such
    term is used herein;

   

  (e) Promptly notify the Company and the Representatives
    of all communications received by the Trustee with respect to any Property requiring action by the Company;

   

  (f) Supply any necessary information or documents
    as may be requested by the Company (or its authorized agents) in connection with the Company’s preparation of the tax returns
    relating to assets held in the Trust Account;

   

  (g) Participate in any plan or proceeding for
    protecting or enforcing any right or interest arising from the Property if, as and when instructed by the Company to do so;

   

  (h) Render to the Company monthly written statements
    of the activities of, and amounts in, the Trust Account reflecting all receipts and disbursements of the Trust Account;

   

  (i) Commence liquidation of the Trust Account
    only after and promptly after (x) receipt of, and only in accordance with, the terms of a letter from the Company (“Termination
        Letter”) in a form substantially similar to that attached hereto as either Exhibit A or Exhibit B, as applicable,
    signed on behalf of the Company by its Chief Executive Officer, Chief Financial Officer, President, Executive Vice President, Vice
    President, Secretary or Chair of the board of directors of the Company (the “Board”) or other authorized
    officer of the Company, and complete the liquidation of the Trust Account and distribute the Property in the Trust Account, including
    interest not previously released to the Company to pay its franchise and income taxes (less up to $100,000 of interest that may
    be released to the Company to pay dissolution expenses), only as directed in the Termination Letter and the other documents referred
    to therein, or (y) upon the date which is, the later of (1) 24 months after the closing of the Offering and (2) such later date
    as may be approved by the Company’s stockholders in accordance with the Company’s amended and restated certificate
    of incorporation if a Termination Letter has not been received by the Trustee prior to such date, in which case the Trust Account
    shall be liquidated in accordance with the procedures set forth in the Termination Letter attached as Exhibit B and the Property
    in the Trust Account, including interest not previously released to the Company to pay its franchise and income taxes (less up
    to $100,000 of interest that may be released to the Company to pay dissolution expenses) shall be distributed to the Public Stockholders
    of record as of such date;

   

  (j) Upon written request from the Company, which
    may be given from time to time in a form substantially similar to that attached hereto as Exhibit C, withdraw from the Trust Account
    and distribute to the Company the amount of interest earned on the Property requested by the Company to cover any tax obligation,
    including any franchise tax obligations, owed by the Company as a result of assets of the Company or interest or other income earned
    on the Property, which amount shall be delivered directly to the Company by electronic funds transfer or other method of prompt
    payment, and the Company shall forward such payment to the relevant taxing authority, as applicable; provided, however, that to
    the extent there is not sufficient cash in the Trust Account to pay such tax obligation, the Trustee shall liquidate such assets
    held in the Trust Account as shall be designated by the Company in writing to make such distribution, so long as there is no reduction
    in the principal amount per share initially deposited in the Trust Account; provided, further, that if the tax to be paid is a
    franchise tax, the written request by the Company to make such distribution shall be accompanied by a copy of the franchise tax
    bill from the State of Delaware for the Company (it being acknowledged and agreed that any such amount in excess of interest income
    earned on the Property shall not be payable from the Trust Account). The written request of the Company referenced above shall
    constitute presumptive evidence that the Company is entitled to said funds, and the Trustee shall have no responsibility to look
    beyond said request;

   

  (k) Upon written request from the Company, which
    may be given from time to time in a form substantially similar to that attached hereto as Exhibit D, the Trustee shall distribute
    on behalf of the Company the amount requested by the Company to be used to redeem shares of Common Stock from Public Stockholders
    properly submitted in connection with a stockholder vote to approve an amendment to the Company’s amended and restated certificate
    of incorporation to (i) modify the substance or timing of the Company’s obligation to allow redemption in connection with
    a Business Combination or to redeem 100% of the shares of Common Stock included in the Units sold in the Offering if the Company
    does not complete a Business Combination within the time period set forth in the Company’s amended and restated certificate
    of incorporation or (ii) with respect to any other provision relating to stockholders’ rights or pre-initial Business Combination
    activity; and

   

  
  
     

  

  
     

  

  
   

  (l) Not make any withdrawals or distributions
    from the Trust Account other than pursuant to Section 1(i), (j) or (k) above.

   

  2. Agreements and Covenants of the Company.
    The Company hereby agrees and covenants to:

   

  (a) Give all instructions to the Trustee hereunder
    in writing, signed by the Company’s Chair of the Board, Chief Executive Officer, Chief Financial Officer, President, Executive
    Vice President, Vice President or Secretary. In addition, except with respect to its duties under Sections 1(i), 1(j) and 1(k)
    hereof, the Trustee shall be entitled to rely on, and shall be protected in relying on, any verbal or telephonic advice or instruction
    which it, in good faith and with reasonable care, believes to be given by any one of the persons authorized above to give written
    instructions, provided that the Company shall promptly confirm such instructions in writing;

   

  (b) Subject to Section 4 hereof, hold the Trustee
    harmless and indemnify the Trustee from and against any and all expenses, including reasonable counsel fees and disbursements,
    or losses suffered by the Trustee in connection with any action taken by it hereunder and in connection with any action, suit or
    other proceeding brought against the Trustee involving any claim, or in connection with any claim or demand, which in any way arises
    out of or relates to this Agreement, the services of the Trustee hereunder, or the Property or any interest earned on the Property,
    except for expenses and losses resulting from the Trustee’s gross negligence, fraud or willful misconduct. Promptly after
    the receipt by the Trustee of notice of demand or claim or the commencement of any action, suit or proceeding, pursuant to which
    the Trustee intends to seek indemnification under this Section 2(b), it shall notify the Company in writing of such claim (hereinafter
    referred to as the “Indemnified Claim”). The Trustee shall have the right to conduct and manage the defense
    against such Indemnified Claim; provided that the Trustee shall obtain the consent of the Company with respect to the selection
    of counsel, which consent shall not be unreasonably withheld. The Trustee may not agree to settle any Indemnified Claim without
    the prior written consent of the Company, which such consent shall not be unreasonably withheld. The Company may participate in
    such action with its own counsel;

   

  (c) Pay the Trustee the fees set forth on Schedule
    A hereto, including an initial acceptance fee, annual administration fee, and transaction processing fee which fees shall be subject
    to modification by the parties from time to time. It is expressly understood that the Property shall not be used to pay such fees
    unless and until the closing of the Business Combination (defined below). The Company shall pay the Trustee the initial acceptance
    fee and the first annual administration fee at the consummation of the Offering. The Company shall not be responsible for any other
    fees or charges of the Trustee except as set forth in this Section 2(c), Schedule A and as may be provided in Section 2(b) hereof;

   

  (d) In connection with any vote of the Company’s
    stockholders regarding a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business
    combination involving the Company and one or more businesses (the “Business Combination”), provide to
    the Trustee an affidavit or certificate of the inspector of elections for the stockholder meeting verifying the vote of such stockholders
    regarding such Business Combination;

   

  (e) Provide the Representatives with a copy of
    any Termination Letter(s) and/or any other correspondence that is sent to the Trustee with respect to any proposed withdrawal from
    the Trust Account promptly after it issues the same;

   

  (f) Unless otherwise agreed among the Company
    and the Representatives, ensure that any Instruction Letter (as defined in Exhibit A) delivered in connection with a Termination
    Letter in the form of Exhibit A expressly provides that the Deferred Discount is paid directly to the account or accounts directed
    by the Representatives on behalf of the Underwriters prior to any transfer of the funds held in the Trust Account to the Company
    or any other person;

   

  (g) Instruct the Trustee to make only those distributions
    that are permitted under this Agreement, and refrain from instructing the Trustee to make any distributions that are not permitted
    under this Agreement; and

   

  
  
     

  

  
     

  

  
   

  (h) Within five (5) business days after the Representatives,
    on behalf of the Underwriters, exercise the over-allotment option (or any unexercised portion thereof) or such over-allotment option
    expires, provide the Trustee with a notice in writing of the total amount of the Deferred Discount, which shall in no event be
    less than $8,312,500.

   

  3. Limitations of Liability. The Trustee
    shall have no responsibility or liability to:

   

  (a) Imply obligations, perform duties, inquire
    or otherwise be subject to the provisions of any agreement or document other than this Agreement and that which is expressly set
    forth herein;

   

  (b) Take any action with respect to the Property,
    other than as directed in Section 1 hereof, and the Trustee shall have no liability to any third party except for liability arising
    out of the Trustee’s gross negligence, fraud or willful misconduct;

   

  (c) Institute any proceeding for the collection
    of any principal and income arising from, or institute, appear in or defend any proceeding of any kind with respect to, any of
    the Property unless and until it shall have received instructions from the Company given as provided herein to do so and the Company
    shall have advanced or guaranteed to it funds sufficient to pay any expenses incident thereto;

   

  (d) Refund any depreciation in principal of any
    Property;

   

  (e) Assume that the authority of any person designated
    by the Company to give instructions hereunder shall not be continuing unless provided otherwise in such designation, or unless
    the Company shall have delivered a written revocation of such authority to the Trustee;

   

  (f) The other parties hereto or to anyone else
    for any action taken or omitted by it, or any action suffered by it to be taken or omitted, in good faith and in the Trustee’s
    best judgment, except for the Trustee’s gross negligence, fraud or willful misconduct. The Trustee may rely conclusively
    and shall be protected in acting upon any order, notice, demand, certificate, opinion or advice of counsel (including counsel chosen
    by the Trustee, which counsel may be the Company’s counsel), statement, instrument, report or other paper or document (not
    only as to its due execution and the validity and effectiveness of its provisions, but also as to the truth and acceptability of
    any information therein contained) which the Trustee believes, in good faith and with reasonable care, to be genuine and to be
    signed or presented by the proper person or persons. The Trustee shall not be bound by any notice or demand, or any waiver, modification,
    termination or rescission of this Agreement or any of the terms hereof, unless evidenced by a written instrument delivered to the
    Trustee, signed by the proper party or parties and, if the duties or rights of the Trustee are affected, unless it shall give its
    prior written consent thereto;

   

  (g) Verify the accuracy of the information contained
    in the Registration Statement;

   

  (h) Provide any assurance that any Business Combination
    entered into by the Company or any other action taken by the Company is as contemplated by the Registration Statement;

   

  (i) File information returns with respect to the
    Trust Account with any local, state or federal taxing authority or provide periodic written statements to the Company documenting
    the taxes payable by the Company, if any, relating to any interest income earned on the Property;

   

  (j) Prepare, execute and file tax reports, income
    or other tax returns and pay any taxes with respect to any income generated by, and activities relating to, the Trust Account,
    regardless of whether such tax is payable by the Trust Account or the Company, including, but not limited to, franchise and income
    tax obligations, except pursuant to Section 1(j) hereof; or

   

  (k) Verify calculations, qualify or otherwise
    approve the Company’s written requests for distributions pursuant to Sections 1(i), 1(j) or 1(k) hereof.

   

  
  
     

  

  
     

  

  
   

  4. Trust Account Waiver. The Trustee
    has no right of set-off or any right, title, interest or claim of any kind (“Claim”) to, or to any monies
    in, the Trust Account, and hereby irrevocably waives any Claim to, or to any monies in, the Trust Account that it may have now
    or in the future. In the event the Trustee has any Claim against the Company under this Agreement, including, without limitation,
    under Section 2(b) or Section 2(c) hereof, the Trustee shall pursue such Claim solely against the Company and its assets outside
    the Trust Account and not against the Property or any monies in the Trust Account.

   

  5. Termination. This Agreement shall
    terminate as follows:

   

  (a) If the Trustee gives written notice to the
    Company that it desires to resign under this Agreement, the Company shall use its reasonable efforts to locate a successor trustee,
    pending which the Trustee shall continue to act in accordance with this Agreement. At such time that the Company notifies the Trustee
    that a successor trustee has been appointed by the Company and has agreed to become subject to the terms of this Agreement, the
    Trustee shall transfer the management of the Trust Account to the successor trustee, including but not limited to the transfer
    of copies of the reports and statements relating to the Trust Account, whereupon this Agreement shall terminate; provided, however,
    that in the event that the Company does not locate a successor trustee within ninety (90) days of receipt of the resignation notice
    from the Trustee, the Trustee may submit an application to have the Property deposited with any court in the State of New York
    or with the United States District Court for the Southern District of New York and upon such deposit, the Trustee shall be immune
    from any liability whatsoever; or

   

  (b) At such time that the Trustee has completed
    the liquidation of the Trust Account and its obligations in accordance with the provisions of Section 1(i) hereof (which section
    may not be amended under any circumstances) and distributed the Property in accordance with the provisions of the Termination Letter,
    this Agreement shall terminate except with respect to Section 2(b) and Section 4.

   

  6. Miscellaneous.

   

  (a) The Company and the Trustee each acknowledge
    that the Trustee will follow the security procedures set forth below with respect to funds transferred from the Trust Account.
    The Company and the Trustee will each restrict access to confidential information relating to such security procedures to authorized
    persons. Each party must notify the other party immediately if it has reason to believe unauthorized persons may have obtained
    access to such confidential information, or of any change in its authorized personnel. In executing funds transfers, the Trustee
    shall rely upon all information supplied to it by the Company, including, account names, account numbers, and all other identifying
    information relating to a Beneficiary, Beneficiary’s bank or intermediary bank. Except for any liability arising out of the
    Trustee’s gross negligence, fraud or willful misconduct, the Trustee shall not be liable for any loss, liability or expense
    resulting from any error in the information or transmission of the funds.

   

  (b) This Agreement shall be governed by and construed
    and enforced in accordance with the laws of the State of New York, without giving effect to conflicts of law principles that would
    result in the application of the substantive laws of another jurisdiction. This Agreement may be executed in several original or
    facsimile counterparts, each one of which shall constitute an original, and together shall constitute but one instrument.

   

  (c) This Agreement contains the entire agreement
    and understanding of the parties hereto with respect to the subject matter hereof. This Agreement or any provision hereof may only
    be changed, amended or modified (other than to correct a typographical error) by a writing signed by each of the parties hereto.

   

  (d) This Agreement or any provision hereof may
    only be changed, amended or modified pursuant to Section 6(c) hereof with the Consent of the Stockholders. For purposes of this
    Section 6(d), the “Consent of the Stockholders” means (i) receipt by the Trustee of a certificate from
    the inspector of elections of the stockholder meeting certifying that the Company’s stockholders of record as of a record
    date established in accordance with Section 213(a) of the Delaware General Corporation Law, as amended (or any successor rule),
    who hold sixty-five percent (65%) or more of all then outstanding shares of the Common Stock and Class B common stock, par value
    $0.0001 per share, of the Company voting together as a single class, have voted in favor of such change, amendment or modification,
    or (ii) the Company’s stockholders of record as of the record date who hold sixty-five percent (65%) or more of all then
    outstanding shares of the Common Stock and Class B common stock, par value $0.0001 per share, of the Company voting together as
    a single class, have delivered to the Trustee a signed writing approving such change, amendment or modification. No such amendment
    will affect any Public Stockholder who has otherwise indicated his, her or its election to redeem his, her or its shares of Common
    Stock in connection with a stockholder vote sought to amend this Agreement, including a corresponding change to the Company’s
    amended and restated certificate of incorporation. Except for any liability arising out of the Trustee’s gross negligence,
    fraud or willful misconduct, the Trustee may rely conclusively on the certification from the inspector or elections referenced
    above and shall be relieved of all liability to any party for executing the proposed amendment in reliance thereon.

   

  
  
     

  

  
     

  

  
   

  (e) The parties hereto consent to the jurisdiction
    and venue of any state or federal court located in the City of New York, State of New York, for purposes of resolving any disputes
    hereunder. AS TO ANY CLAIM, CROSS-CLAIM OR COUNTERCLAIM IN ANY WAY RELATING TO THIS AGREEMENT, EACH PARTY WAIVES THE RIGHT TO TRIAL
    BY JURY.

   

  (f) Any notice, consent or request to be given
    in connection with any of the terms or provisions of this Agreement shall be in writing and shall be sent by express mail or similar
    private courier service, by certified mail (return receipt requested), by hand delivery or by electronic mail:

   

  if to the Trustee, to:

   

  Continental Stock Transfer & Trust Company

    1 State Street, 30th Floor

    New York, NY 10004

    Attn: Francis Wolf and Celeste Gonzalez

    Email: fwolf@continentalstock.com

    cgonzalez@continentalstock.com

   

  if to the Company, to:

   

  Sustainable Development Acquisition I Corp.

    113 S. La Brea Avenue., 3rd Floor

  Los Angeles, CA 90036

    Attn: Nicole Neeman Brady

  Email: nnb@renewablesgroup.com

   

  in each case, with copies,
    which shall not constitute notice, to:

   

  Ropes & Gray LLP

  1211 Avenue of the Americas

  New York, NY 10036

  Attn: Paul Tropp and Michael Pilo

  Email: paul.tropp@ropesgray.com, michael.pilo@ropesgray.com

  and

  Barclays Capital Inc.

  745 Seventh Avenue

  New York, NY 10019

  Attn: Syndicate Registration

  Fax: 646-834-8133

  and

  BofA Securities, Inc.

  One Bryant Park,

  New York, NY 10010

  Syndicate Department

  with a copy to:

  Facsimile: (212) 230-8730

  Attention: ECM Legal

   

  
  
     

  

  
     

  

  
   

  and

   

  Skadden, Arps, Slate, Meagher &
    Flom LLP

  525 University Avenue

  Palo Alto, California 94301-1908

  Attn: Michael Mies

  Email: michael.mies@skadden.com

   

  (g) Each of the Company and the Trustee hereby
    represents that it has the full right and power and has been duly authorized to enter into this Agreement and to perform its respective
    obligations as contemplated hereunder. The Trustee acknowledges and agrees that it shall not make any claims or proceed against
    the Trust Account, including by way of set-off, and shall not be entitled to any funds in the Trust Account under any circumstance.

   

  (h) This Agreement is the joint product of the
    Trustee and the Company and each provision hereof has been subject to the mutual consultation, negotiation and agreement of such
    parties and shall not be construed for or against any party hereto.

   

  (i) This Agreement may be executed in any number
    of counterparts, each of which shall be deemed to be an original, but all such counterparts shall together constitute one and the
    same instrument. Delivery of a signed counterpart of this Agreement by facsimile or electronic transmission shall constitute valid
    and sufficient delivery thereof.

   

  (j) Each of the Company and the Trustee hereby
    acknowledges and agrees that the Representatives on behalf of the Underwriters are third party beneficiaries of this Agreement.

   

  (k) Except as specified herein, no party to this
    Agreement may assign its rights or delegate its obligations hereunder to any other person or entity.

   

  [Signature Page Follows]

   

  
  
     

  

  
     

  

  
   

  IN WITNESS WHEREOF, the parties have
    duly executed this Investment Management Trust Agreement as of the date first written above.

   

  	 	CONTINENTAL STOCK TRANSFER &
	 	TRUST COMPANY, as Trustee
	 	 
	 	By: 	 
	 	Name:	 Francis Wolf
	 	Title:	Vice President
	 	 	 
	 	Sustainable Development Acquisition I Corp.
	 	 
	 	By:	 
	 	Name:	Nicole Neeman Brady
	 	Title:	Chief Executive Officer

   

  [Signature Page to Investment Management Trust
    Agreement]

   

  
  
     

  

  
     

  

  
   

  SCHEDULE
        A

   

  	Fee Item	 	Time and method of payment	 	Amount	 
	Initial set-up fee	 	Initial closing of Offering by wire transfer	 	$	3,500.00	 
	Trustee administration fee	 	First year, initial closing of Offering by wire transfer, thereafter on the anniversary of the effective date of the Offering by wire transfer or
            check	 	$	10,000.00	 
	Transaction processing fee for disbursements to Company under Sections 1(i) and 1(j)	 	Billed to Company following disbursement made to Company under Section 1	 	$	250.00	 
	Paying Agent services as required pursuant to Sections 1(i) and 1(k)	 	Billed to Company upon delivery of service pursuant to Sections 1(i) and 1(k)	 	 	Prevailing rates	 

   

  
  
     

  

  
     

  

  
   

  EXHIBIT
        A

  [Letterhead of Company]

  [Insert date]

   

  Continental Stock Transfer & Trust Company

    1 State Street, 30th Floor

    New York, New York 10004

    Attn: Francis Wolf and Celeste Gonzalez

   

  Re: Trust Account - Termination Letter

   

  Mr. Wolf and Ms. Gonzalez:

   

  Pursuant to Section 1(i) of the Investment Management
    Trust Agreement between Sustainable Development Acquisition I Corp. (the “Company”) and Continental Stock
    Transfer & Trust Company (the “Trustee”), dated as of _________, 2021 (the “Trust Agreement”),
    this is to advise you that the Company has entered into an agreement with [__________] (the “Target Business”)
    to consummate a business combination with the Target Business (the “Business Combination”) on or about
    [insert date]. The Company shall notify you at least seventy-two (72) hours in advance (or such shorter time as you may agree)
    of the actual date of the consummation of the Business Combination (the “Consummation Date”). Capitalized
    terms used but not defined herein shall have the meanings set forth in the Trust Agreement.

   

  In accordance with the terms of the Trust Agreement,
    we hereby authorize you to commence to liquidate all of the assets of the Trust Account and transfer the proceeds to a segregated
    account held by you on behalf of the Beneficiaries to the effect that, on the Consummation Date, all of the funds held in the Trust
    Operating Account at JP Morgan Chase Bank, N.A. will be immediately available for transfer to the account or accounts that the
    Company shall direct on the Consummation Date (including as directed to it by the Representatives on behalf of the Underwriters
    (with respect to the Deferred Discount)). It is acknowledged and agreed that while the funds are on deposit in the trust operating
    account at J.P. Morgan Chase Bank, N.A. awaiting distribution, the Company will not earn any interest or dividends.

   

  On the Consummation Date (i) counsel for the
    Company shall deliver to you written notification that the Business Combination has been consummated, or will be consummated substantially
    concurrently with your transfer of funds to the accounts as directed by the Company (the “Notification”)
    and (ii) the Company shall deliver to you (a) a certificate of the Chief Executive Officer, which verifies that the Business Combination
    has been approved by a vote of the Company’s stockholders, if a vote is held and (b) a joint written instruction signed by
    the Company and the Representatives with respect to the transfer of the funds held in the Trust Account, including payment of amounts
    owed to public stockholders who have properly exercised their redemption rights and payment of the Deferred Discount to the Representatives
    from the Trust Account (the “Instruction Letter”). You are hereby directed and authorized to transfer
    the funds held in the Trust Account immediately upon your receipt of the Notification and the Instruction Letter, in accordance
    with the terms of the Instruction Letter. In the event that certain deposits held in the Trust Account may not be liquidated by
    the Consummation Date without penalty, you will notify the Company in writing of the same and the Company shall direct you as to
    whether such funds should remain in the Trust Account and be distributed after the Consummation Date to the Company. Upon the distribution
    of all the funds, net of any payments necessary for reasonable unreimbursed expenses related to liquidating the Trust Account,
    your obligations under the Trust Agreement shall be terminated.

   

  In the event that the Business Combination is
    not consummated on the Consummation Date described in the notice thereof and we have not notified you on or before the original
    Consummation Date of a new Consummation Date, then upon receipt by the Trustee of written instructions from the Company, the funds
    held in the Trust Account shall be reinvested as provided in Section 1(c) of the Trust Agreement on the business day immediately
    following the Consummation Date as set forth in such notice as soon thereafter as possible.

   

  
  
     

  

  
     

  

  
    

  	 	 	Very truly yours,
	 	 	 
	 	 	Sustainable Development Acquisition I Corp.
	 	 	 
	 	 	By:	          
	 	 	Name:	 
	 	 	Title:	 
	cc:	Barclays Capital Inc.	 
	 	BofA Securities, Inc.	 

   

  
  
    	 	A-2	 

  

  
     

  

  
   

  EXHIBIT
        B

  [Letterhead of Company]

  [Insert date]

   

  Continental Stock Transfer & Trust Company

    1 State Street, 30th Floor

    New York, New York 10004

    Attn: Francis Wolf and Celeste Gonzalez

   

  Re: Trust Account - Termination Letter

   

  Mr. Wolf and Ms. Gonzalez:

   

  Pursuant to Section 1(i) of the Investment Management
    Trust Agreement between Sustainable Development Acquisition I Corp. (the “Company”) and Continental Stock
    Transfer & Trust Company (the “Trustee”), dated as of _________, 2021 (the “Trust Agreement”),
    this is to advise you that the Company did not effect a business combination with a Target Business (the “Business
        Combination”) within the time frame specified in the Company’s amended and restated certificate of incorporation,
    as described in the Company’s Prospectus relating to the Offering. Capitalized terms used but not defined herein shall have
    the meanings set forth in the Trust Agreement.

   

  In accordance with the terms of the Trust Agreement,
    we hereby authorize you to liquidate all of the assets in the Trust Account and transfer the total proceeds into a segregated account
    held by you on behalf of the Beneficiaries to await distribution to the Public Stockholders. The Company has selected [_________,
    20__]1 as the effective date for the purpose of determining
    when the Public Stockholders will be entitled to receive their share of the liquidation proceeds. You agree to be the Paying Agent
    of record and, in your separate capacity as Paying Agent, agree to distribute said funds directly to the Company’s Public
    Stockholders in accordance with the terms of the Trust Agreement and the Company’s amended and restated certificate of incorporation.
    Upon the distribution of all the funds, net of any payments necessary for reasonable unreimbursed expenses related to liquidating
    the Trust Account, your obligations under the Trust Agreement shall be terminated, except to the extent otherwise provided in Section
    1(i) of the Trust Agreement.

   

   

  	 	 	Very truly yours,
	 	 	 
	 	 	Sustainable Development Acquisition I Corp.
	 	 	 
	 	 	By:	         
	 	 	Name:	 
	 	 	Title:	 
	cc:	Barclays Capital Inc.	 
	 	BofA Securities, Inc.	 

   

  

  

  
  
     

  

  
  

  1 24 months from the closing of the Offering or at a
    later date, if extended.

   

  
  
     

  

  
     

  

  
   

  EXHIBIT
        C

  [Letterhead of Company]

  [Insert date]

   

  Continental Stock Transfer & Trust Company

    1 State Street, 30th Floor

    New York, New York 10004

    Attn: Francis Wolf and Celeste Gonzalez

   

  Re: Trust Account - Withdrawal Instruction

   

  Mr. Wolf and Ms. Gonzalez:

   

  Pursuant to Section 1(j) of the Investment Management
    Trust Agreement between Sustainable Development Acquisition I Corp. (the “Company”) and Continental Stock
    Transfer & Trust Company (the “Trustee”), dated as of _________, 2021 (the “Trust Agreement”),
    the Company hereby requests that you deliver to the Company $[_____] of the interest income earned on the Property as of the date
    hereof. Capitalized terms used but not defined herein shall have the meanings set forth in the Trust Agreement.

   

  The Company needs such funds [to pay for the
    tax obligations as set forth on the attached tax return or tax statement]. In accordance with the terms of the Trust Agreement,
    you are hereby directed and authorized to transfer (via wire transfer) such funds promptly upon your receipt of this letter to
    the Company’s operating account at:

   

  [WIRE
        INSTRUCTION INFORMATION]

   

  	 	 	Very truly yours,
	 	 	 
	 	 	Sustainable Development Acquisition I Corp. 
	 	 	 
	 	 	By:	         
	 	 	Name:	 
	 	 	Title:	 
	cc:	Barclays Capital Inc.	 
	 	BofA Securities, Inc.	 

   

  
  
     

  

  
     

  

  
   

  EXHIBIT
        D

  [Letterhead of Company]

  [Insert date]

   

  Continental Stock Transfer & Trust Company

    1 State Street, 30th Floor

    New York, New York 10004

    Attn: Francis Wolf and Celeste Gonzalez

   

  Re: Trust Account - Stockholder Redemption Withdrawal
      Instruction

   

  Mr. Wolf and Ms. Gonzalez:

   

  Pursuant to Section 1(k) of the Investment Management
    Trust Agreement between Sustainable Development Acquisition I Corp. (the “Company”) and Continental Stock
    Transfer & Trust Company (the “Trustee”), dated as of _________, 2021 (the “Trust Agreement”),
    the Company hereby requests that you deliver to the redeeming Public Stockholders of the Company $[_____] of the principal and
    interest income earned on the Property as of the date hereof to a segregated account held by you on behalf of the Beneficiaries
    for distribution to the Public Stockholders who have requested redemption of their shares of Common Stock. Capitalized terms used
    but not defined herein shall have the meanings set forth in the Trust Agreement.

   

  The Company needs such funds to pay its Public
    Stockholders who have properly elected to have their shares of Common Stock redeemed by the Company in connection with a stockholder
    vote to approve an amendment to the Company’s amended and restated certificate of incorporation to (i) modify the substance
    or timing of the Company’s obligation to allow redemption in connection with a Business Combination or to redeem 100% of
    the shares of Common Stock included in the Units sold in the Offering if the Company does not complete a Business Combination within
    the time period set forth in the Company’s amended and restated certificate of incorporation or (ii) with respect to any
    other provision relating to stockholders’ rights or pre-initial Business Combination activity. As such, you are hereby directed
    and authorized to transfer (via wire transfer) such funds promptly upon your receipt of this letter.

   

  	 	 	Very truly yours,
	 	 	 
	 	 	Sustainable Development Acquisition I Corp. 
	 	 	 
	 	 	By:	        
	 	 	Name:	 
	 	 	Title:	 
	cc:	Barclays Capital Inc.	 
	 	BofA Securities, Inc.Exhibit 10.4

   

  WARRANT
        PURCHASE AGREEMENT

   

  THIS WARRANT PURCHASE AGREEMENT (as it may from
    time to time be amended, this “Agreement”), dated as of February [__], 2021, is entered into by and among Sustainable
    Development Acquisition I Corp., a Delaware public benefit corporation (the “Company”), and Sustainable Development
    Sponsor, LLC, a Delaware limited liability company (the “Purchaser”).

   

  WHEREAS, the Company intends to consummate an
    initial public offering of the Company’s units (the “Public Offering”), each unit consisting of one share
    of Class A common stock of the Company, par value $0.0001 per share (each, a “Share”), and one-half of one redeemable
    warrant, each whole warrant entitling the holder to purchase one Share at an exercise price of $11.50 per Share, as set forth in
    the Company’s Registration Statement on Form S-1, filed with the U.S. Securities and Exchange Commission (the “SEC”),
    File Number 333-[__________] (the “Registration Statement”), under the Securities Act of 1933, as amended (the
    “Securities Act”).

   

  WHEREAS, the Purchaser has agreed to purchase,
    at a price of $1.00 per warrant, an aggregate of 8,000,000 warrants (and up to 750,000 additional warrants if the underwriters
    in the Public Offering exercise their over-allotment option in full) (the “Private Placement Warrants”), each
    Private Placement Warrant entitling the holder to purchase one Share at an exercise price of $11.50 per Share.

   

  NOW THEREFORE, in consideration of the mutual
    promises contained in this Agreement and other good and valuable consideration, the receipt and sufficiency of which are hereby
    acknowledged, the parties to this Agreement hereby, intending legally to be bound, agree as follows:

   

  AGREEMENT

   

  Section 1. Authorization, Purchase and Sale;
      Terms of the Private Placement Warrants.

   

  A. Authorization of the Private
      Placement Warrants. The Company has duly authorized the issuance and sale of the Private Placement Warrants to the Purchaser.

   

  B. Purchase and Sale of the Private
      Placement Warrants.

   

  (i) On the date of the consummation
    of the Public Offering (the “IPO Closing Date”), the Company shall issue and sell to the Purchaser, and the
    Purchaser shall purchase from the Company, 8,000,000 Private Placement Warrants at a price of $1.00 per warrant for an aggregate
    purchase price of $8,000,000 (the “Purchase Price”). The Purchaser shall pay the Purchase Price by wire transfer
    of immediately available funds in accordance with the Company’s wiring instructions, at least one (1) business day prior
    to the IPO Closing Date. On the IPO Closing Date, upon the payment by the Purchaser of the Purchase Price, by wire transfer of
    immediately available funds to the Company, the Company, at its option, shall deliver a certificate evidencing the Private Placement
    Warrants purchased on such date duly registered in the Purchaser’s name to the Purchaser or effect such delivery in book-entry
    form.

   

  (ii) On the date of the closing of the
    over-allotment option, if any, in connection with the Public Offering or on such earlier time and date as may be mutually agreed
    by the Purchaser and the Company (each such date, an “Over-allotment Closing Date”, and each Over-allotment
    Closing Date (if any) and the IPO Closing Date, a “Closing Date”), the Company shall issue and sell to the Purchaser,
    and the Purchaser shall purchase from the Company, up to 750,000 Private Placement Warrants (or, to the extent the over-allotment
    option is not exercised in full, a lesser number of Private Placement Warrants in proportion to portion of the over-allotment option
    that is exercised) at a price of $1.00 per warrant for an aggregate purchase price of up to $750,000 (the “Over-allotment
      Purchase Price”). The Purchaser shall pay the Over-allotment Purchase Price by wire transfer of immediately available
    funds in accordance with the Company’s wiring instructions, at least one (1) business day prior to the Over-allotment Closing
    Date. On the Over-allotment Closing Date, upon the payment by the Purchaser of the Over-allotment Purchase Price, by wire transfer
    of immediately available funds to the Company, the Company, at its option, shall deliver a certificate evidencing the Private Placement
    Warrants purchased on such date duly registered in the Purchaser’s name to the Purchaser or effect such delivery in book-entry
    form.

   

  
  
     

  

  
     

  

  
   

  C. Terms of the Private Placement
      Warrants.

   

  (i) Each Private Placement Warrant shall
    have the terms set forth in a Warrant Agreement to be entered into by the Company and a warrant agent, in connection with the Public
    Offering (the “Warrant Agreement”), and shall be subject to the terms of a letter agreement to be entered into
    by the Company, the Purchaser and the other parties thereto, in connection with the Public Offering.

   

  (ii) At the time of, or prior to, the
    IPO Closing Date, the Company and the Purchaser shall enter into a registration and stockholder rights agreement (the “Registration
      and Stockholder Rights Agreement”) pursuant to which the Company will grant certain registration rights to the Purchaser
    relating to the Private Placement Warrants and the Shares underlying the Private Placement Warrants.

   

  Section 2. Representations and Warranties
      of the Company.

   

  As a material inducement to the Purchaser to
    enter into this Agreement and purchase the Private Placement Warrants, the Company hereby represents and warrants to the Purchaser
    (which representations and warranties shall survive each Closing Date) that:

   

  A. Incorporation and Corporate
      Power. The Company is a corporation duly incorporated, validly existing and in good standing under the laws of the State of
    Delaware and is qualified to do business in every jurisdiction in which the failure to so qualify would reasonably be expected
    to have a material adverse effect on the financial condition, operating results or assets of the Company. The Company possesses
    all requisite corporate power and authority necessary to carry out the transactions contemplated by this Agreement and the Warrant
    Agreement.

   

  B. Authorization; No Breach.

   

  (i) The execution, delivery and performance
    of this Agreement and the Private Placement Warrants have been duly authorized by the Company as of each Closing Date. This Agreement
    constitutes the valid and binding obligation of the Company, enforceable in accordance with its terms, subject to bankruptcy, insolvency,
    fraudulent conveyance, reorganization, moratorium and other laws of general applicability relating to or affecting creditors’
    rights and to general equitable principles (whether considered in a proceeding in equity or law). Upon issuance in accordance with,
    and payment pursuant to, the terms of the Warrant Agreement and this Agreement, the Private Placement Warrants will constitute
    valid and binding obligations of the Company, enforceable in accordance with their terms as of each Closing Date.

   

  (ii) The execution and delivery by the
    Company of this Agreement and the Private Placement Warrants, the issuance and sale of the Private Placement Warrants, the issuance
    of the Shares upon exercise of the Private Placement Warrants and the fulfillment of and compliance with the respective terms hereof
    and thereof by the Company, do not and will not as of each Closing Date (a) conflict with or result in a breach of the terms, conditions
    or provisions of, (b) constitute a default under, (c) result in the creation of any lien, security interest, charge or encumbrance
    upon the Company’s capital stock or assets under, (d) result in a violation of, or (e) require any authorization, consent,
    approval, exemption or other action by or notice or declaration to, or filing with, any court or administrative or governmental
    body or agency pursuant to the certificate of incorporation or the bylaws of the Company (in effect on the date hereof or as may
    be amended prior to completion of the Public Offering) or any material law, statute, rule or regulation to which the Company is
    subject, or any agreement, order, judgment or decree to which the Company is subject, except for any filings required after the
    date hereof under federal or state securities laws.

   

  
  
     

  

  
     

  

  
   

  C. Title to Securities. Upon
    issuance in accordance with, and payment pursuant to, the terms hereof and the Warrant Agreement, the Shares issuable upon exercise
    of the Private Placement Warrants will be duly and validly issued, fully paid and nonassessable. Upon issuance in accordance with,
    and payment pursuant to, the terms hereof and the Warrant Agreement, the Purchaser will have good title to the Private Placement
    Warrants purchased by it and the Shares issuable upon exercise of such Private Placement Warrants, free and clear of all liens,
    claims and encumbrances of any kind, other than (i) transfer restrictions hereunder and under the other agreements contemplated
    hereby, (ii) transfer restrictions under federal and state securities laws, and (iii) liens, claims or encumbrances imposed due
    to the actions of the Purchaser.

   

  D. Governmental Consents. No
    permit, consent, approval or authorization of, or declaration to or filing with, any governmental authority is required in connection
    with the execution, delivery and performance by the Company of this Agreement or the consummation by the Company of any other transactions
    contemplated hereby.

   

  E. Regulation D Qualification.
    Neither the Company nor, to its actual knowledge, any of its affiliates, members, officers, directors or beneficial shareholders
    of 20% or more of its outstanding securities, has experienced a disqualifying event as enumerated pursuant to Rule 506(d) of Regulation
    D under the Securities Act.

   

  Section 3. Representations and Warranties
      of the Purchaser.

   

  As a material inducement to the Company to enter
    into this Agreement and issue and sell the Private Placement Warrants to the Purchaser, the Purchaser hereby represents and warrants
    to the Company (which representations and warranties shall survive each Closing Date) that:

   

  A. Organization and Requisite Authority.
    The Purchaser possesses all requisite power and authority necessary to carry out the transactions contemplated by this Agreement.

   

  B. Authorization; No Breach.

   

  (i) This Agreement constitutes a valid
    and binding obligation of the Purchaser, enforceable in accordance with its terms, subject to bankruptcy, insolvency, fraudulent
    conveyance, reorganization, moratorium and other laws of general applicability relating to or affecting creditors’ rights
    and to general equitable principles (whether considered in a proceeding in equity or law).

   

  (ii) The execution and delivery by the
    Purchaser of this Agreement and the fulfillment of and compliance with the terms hereof by the Purchaser does not and shall not
    as of each Closing Date (a) conflict with or result in a breach by the Purchaser of the terms, conditions or provisions of, (b)
    constitute a default under, (c) result in the creation of any lien, security interest, charge or encumbrance upon the Purchaser’s
    equity or assets under, (d) result in a violation of, or (e) require any authorization, consent, approval, exemption or other action
    by or notice or declaration to, or filing with, any court or administrative or governmental body or agency pursuant to the Purchaser’s
    organizational documents in effect on the date hereof or as may be amended prior to completion of the contemplated Public Offering,
    or any material law, statute, rule or regulation to which the Purchaser is subject, or any agreement, instrument, order, judgment
    or decree to which the Purchaser is subject, except for any filings required after the date hereof under federal or state securities
    laws.

   

  
  
     

  

  
     

  

  
   

  C. Investment Representations.

   

  (i) The Purchaser is acquiring the Private
    Placement Warrants and, upon exercise of the Private Placement Warrants, the Shares issuable upon such exercise (collectively,
    the “Securities”) for its own account, for investment purposes only and not with a view towards, or for resale
    in connection with, any public sale or distribution thereof.

   

  (ii) The Purchaser is an “accredited
    investor” as such term is defined in Rule 501(a)(3) of Regulation D, and the Purchaser has not experienced a disqualifying
    event as enumerated pursuant to Rule 506(d) of Regulation D under the Securities Act.

   

  (iii) The Purchaser understands that
    the Securities are being offered and will be sold to it in reliance on specific exemptions from the registration requirements of
    the United States federal and state securities laws and that the Company is relying upon the truth and accuracy of, and the Purchaser’s
    compliance with, the representations and warranties of the Purchaser set forth herein in order to determine the availability of
    such exemptions and the eligibility of the Purchaser to acquire such Securities.

   

  (iv) The Purchaser did not decide to
    enter into this Agreement as a result of any general solicitation or general advertising within the meaning of Rule 502(c) under
    the Securities Act.

   

  (v) The Purchaser has been furnished
    with all materials relating to the business, finances and operations of the Company and materials relating to the offer and sale
    of the Securities which have been requested by the Purchaser. The Purchaser has been afforded the opportunity to ask questions
    of the executive officers and directors of the Company. The Purchaser understands that its investment in the Securities involves
    a high degree of risk and it has sought such accounting, legal and tax advice as it has considered necessary to make an informed
    investment decision with respect to the acquisition of the Securities.

   

  (vi) The Purchaser understands that
    no United States federal or state agency or any other government or governmental agency has passed on or made any recommendation
    or endorsement of the Securities or the fairness or suitability of the investment in the Securities by the Purchaser nor have such
    authorities passed upon or endorsed the merits of the offering of the Securities.

   

  (vii) The Purchaser understands that:
    (a) the Securities 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 (1) subsequently registered thereunder or (2) sold in reliance on an
    exemption therefrom; and (b) except as specifically set forth in the Registration and Stockholder Rights Agreement, 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. In this regard, the Purchaser understands that the
    SEC has taken the position that promoters or affiliates of a blank check company and their transferees, both before and after an
    initial business combination, are deemed to be “underwriters” under the Securities Act when reselling the securities
    of a blank check company. Based on that position, Rule 144 adopted pursuant to the Securities Act would not be available for resale
    transactions of the Securities despite technical compliance with the requirements of such Rule, and the Securities can be resold
    only through a registered offering or in reliance upon another exemption from the registration requirements of the Securities Act.

   

  (viii) The Purchaser has such knowledge
    and experience in financial and business matters, knowledge of the high degree of risk associated with investments in the securities
    of companies in the development stage such as the Company, is capable of evaluating the merits and risks of an investment in the
    Securities and is able to bear the economic risk of an investment in the Securities in the amount contemplated hereunder for an
    indefinite period of time. The Purchaser has adequate means of providing for its current financial needs and contingencies and
    will have no current or anticipated future needs for liquidity which would be jeopardized by the investment in the Securities.
    The Purchaser can afford a complete loss of its investments in the Securities.

   

  
  
     

  

  
     

  

  
   

  Section 4. Conditions of the Purchaser’s
      Obligations.

   

  The obligations of the Purchaser to purchase
    and pay for the Private Placement Warrants are subject to the fulfillment, on or before each Closing Date, of each of the following
    conditions:

   

  A. Representations and Warranties.
    The representations and warranties of the Company contained in Section 2 shall be true and correct at and as of such Closing Date
    as though then made.

   

  B. Performance. The Company
    shall have performed and complied with all agreements, obligations and conditions contained in this Agreement that are required
    to be performed or complied with by it on or before such Closing Date.

   

  C. No Injunction. No litigation,
    statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered, promulgated or endorsed
    by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization having authority over
    the matters contemplated hereby, which prohibits the consummation of any of the transactions contemplated by this Agreement or
    the Warrant Agreement.

   

  D. Warrant Agreement and Registration
      and Stockholder Rights Agreement. The Company shall have entered into the Warrant Agreement and the Registration and Stockholder
    Rights Agreement, in each case on terms satisfactory to the Purchaser.

   

  Section 5. Conditions of the Company’s
      Obligations.

   

  The obligations of the Company to the Purchaser
    under this Agreement are subject to the fulfillment, on or before each Closing Date, of each of the following conditions:

   

  A. Representations and Warranties.
    The representations and warranties of the Purchaser contained in Section 3 shall be true and correct at and as of such Closing
    Date as though then made.

   

  B. Performance. The Purchaser
    shall have performed and complied with all agreements, obligations and conditions contained in this Agreement that are required
    to be performed or complied with by the Purchaser on or before such Closing Date.

   

  C. Corporate Consents. The
    Company shall have obtained the consent of its Board of Directors authorizing the execution, delivery and performance of this Agreement
    and the Warrant Agreement and the issuance and sale of the Private Placement Warrants hereunder.

   

  D. No Injunction. No litigation,
    statute, rule, regulation, executive order, decree, ruling or injunction shall have been enacted, entered, promulgated or endorsed
    by or in any court or governmental authority of competent jurisdiction or any self-regulatory organization having authority over
    the matters contemplated hereby, which prohibits the consummation of any of the transactions contemplated by this Agreement or
    the Warrant Agreement.

   

  E. Warrant Agreement and Registration
      and Stockholder Rights Agreement. The Purchaser shall have entered into the Warrant Agreement and the Registration and Stockholder
    Rights Agreement, in each case on terms satisfactory to the Company.

   

  Section 6. Termination.

   

  This Agreement may be terminated by the Company
    or the Purchaser at any time after March 31, 2021 upon written notice to the other party hereto if the closing of the Public Offering
    does not occur prior to such date.

   

  Section 7. Survival of Representations and
      Warranties.

   

  All of the representations and warranties contained
    herein shall survive each Closing Date.

   

  
  
     

  

  
     

  

  
   

  Section 8. Definitions.

   

  Terms used but not otherwise defined in this
    Agreement shall have the meaning assigned to such terms in the Registration Statement.

   

  Section 9. Miscellaneous.

   

  A. Successors and Assigns.
    Except as otherwise expressly provided herein, all covenants and agreements contained in this Agreement by or on behalf of any
    of the parties hereto shall bind and inure to the benefit of the respective successors of the parties hereto whether so expressed
    or not. Notwithstanding the foregoing or anything to the contrary herein, the parties may not assign this Agreement, other than
    assignments by the Purchaser to affiliates thereof (including, without limitation one or more of its members).

   

  B. Severability. Whenever possible,
    each provision of this Agreement shall be interpreted in such manner as to be effective and valid under applicable law, but if
    any provision of this Agreement is held to be prohibited by or invalid under applicable law, such provision shall be ineffective
    only to the extent of such prohibition or invalidity, without invalidating the remainder of this Agreement.

   

  C. Counterparts. This Agreement
    may be executed simultaneously in two or more counterparts, none of which need contain the signatures of more than one party, but
    all such counterparts taken together shall constitute one and the same agreement. A signed copy of this Agreement delivered by
    facsimile, e-mail or other means of electronic transmission shall be deemed to have the same legal effect as delivery of an original
    signed copy of this Agreement.

   

  D. Descriptive Headings; Interpretation.
    The descriptive headings of this Agreement are inserted for convenience only and do not constitute a substantive part of this Agreement.
    The use of the word “including” in this Agreement shall be by way of example rather than by limitation.

   

  E. Governing Law. This Agreement
    shall be deemed to be a contract made under the laws of the State of New York and for all purposes shall be construed in accordance
    with the internal laws of the State of New York, without giving effect to conflicts of law principles that would result in the
    application of the laws of another jurisdiction.

   

  F. Amendments. This Agreement
    may not be amended, modified or waived as to any particular provision, except by a written instrument executed by all parties hereto.

   

  [Signature page follows]

   

  
  
     

  

  
     

  

  
   

  IN WITNESS WHEREOF, the parties hereto have
    executed this Agreement to be effective as of the date first set forth above.

   

  	 	COMPANY:
	 	 	 
	 	Sustainable Development Acquisition I Corp.
	 	 
	 	By:	 
	 	Name:	Nicole Neeman Brady
	 	Title:	Chief Executive Officer
	 	 	 
	 	PURCHASER:
	 	 
	 	Sustainable Development Sponsor, LLC
	 	 
	 	By:	 
	 	Name:	Nicole Neeman Brady
	 	Title:	Manager

   

  [Signature Page to Warrant Purchase Agreement]

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