Amendment to Agreement and Plan of Merger, dated December 26, 2021

Exhibit 2.1

AMENDMENT TO AGREEMENT AND PLAN OF MERGER

This Amendment (this “Amendment”), entered into and effective as of December 26, 2021, is made to that Agreement and Plan of Merger, dated as of July 18, 2021 (the “Merger Agreement”), by and among ECP Environmental Growth Opportunities Corp., a Delaware corporation (“Acquiror”), ENNV Merger Sub, Inc., a Delaware corporation and direct, wholly-owned subsidiary of Acquiror (“Merger Sub”), and Fast Radius, Inc., a Delaware corporation (the “Company”). Acquiror, Merger Sub, and the Company are collectively referred to herein as the “Parties” and individually as a “Party.” Capitalized terms used herein but not otherwise defined shall have the meanings ascribed to them in the Merger Agreement.

WITNESSETH:

WHEREAS, Section 12.11 of the Merger Agreement provides that the Merger Agreement may be amended or modified in whole or in part by a duly authorized agreement in writing executed by each of the Parties in the same manner as the Merger Agreement and which makes reference to the Merger Agreement; and

WHEREAS, the Parties wish to amend the Merger Agreement on the terms set forth herein.

NOW, THEREFORE, in exchange for good and valuable consideration, the sufficiency of which are hereby acknowledged, and intending to be legally bound hereby, the Parties hereby agree as follows:

1. Amendments:

(a) Section 6.2(b)(iii) of the Merger Agreement is hereby deleted in its entirety and replaced with the following:

“(iii) (A) holders of a majority of the outstanding shares of Acquiror Class A Common Stock and Acquiror Class B Common Stock, voting together as a single class, (B) holders of a majority of the outstanding shares of Acquiror Class A Common Stock, voting separately as a single class, and (C) holders of a majority of the outstanding shares of Acquiror Class B Common Stock, voting separately as a single class, shall be required to approve the Amendment Proposal,”

(b) The form of Acquiror Second A&R Charter attached as Exhibit A to the Merger Agreement is hereby deleted in its entirety and replaced with the form of Acquiror Second A&R Charter set forth in Annex A hereto.

2. Effect of Amendment. This Amendment shall form a part of the Merger Agreement

for all purposes, and each party thereto and hereto shall be bound hereby. No reference to this Amendment need be made in any instrument or document making reference to the Merger Agreement. From and after the execution of this Amendment by the parties hereto, references to “this Agreement,” “hereof,” “hereunder,” “herein,” “hereby” and words of like import referring to the Merger Agreement shall be deemed references to the Merger Agreement as amended by this Amendment.

3. Full Force and Effect. Except as expressly amended by this Amendment, each term, provision, exhibit and schedule of the Merger Agreement is hereby ratified and confirmed and remains in full force and effect. This Amendment may not be amended except by an instrument in writing signed by the parties hereto.

4. Additional Miscellaneous Terms. The provisions of Article XII of the Merger Agreement are hereby incorporated by reference and shall apply mutatis mutandis to this Amendment as if set forth at length herein, and to the Merger Agreement as modified by this Amendment, taken together as a single agreement, reflecting the terms as modified hereby. For the avoidance of doubt, this Amendment and the Merger Agreement, as amended pursuant to this Amendment, and the Ancillary Agreements set forth the entire understanding of the Parties with respect to the transactions contemplated hereby and thereby. Any and all previous agreements and understandings between or among the Parties regarding the subject matter hereof, whether written or oral, are superseded by the documents and agreements referred to in this section.

[Signature Page Follows]

IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be duly executed as of the date first written above.

ANNEX A

FORM OF ACQUIROR SECOND A&R CHARTER

[See attached.]

SECOND AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION

OF

ECP ENVIRONMENTAL GROWTH OPPORTUNITIES CORP.

__________, 2022

ECP Environmental Growth Opportunities Corp., a corporation organized and existing under the laws of the State of Delaware (the “Corporation”), DOES HEREBY CERTIFY AS FOLLOWS:

1. The name of the Corporation is “ECP Environmental Growth Opportunities Corp.”. The original certificate of incorporation of the Corporation was filed with the Secretary of State of the State of Delaware on October 29, 2020 under the name “Electrification and Environmental Acquisition Corp.” and was subsequently amended by the filing of a certificate of amendment of certificate of incorporation with the Secretary of State of the State of Delaware on November 12, 2020, pursuant to which the name of the Corporation was amended to “ECP Environmental Growth Opportunities Corp.” (as so amended, the “Original Certificate”).

2. The Corporation’s Amended and Restated Certificate of Incorporation (the “Amended and Restated Certificate”), which both restated and amended the provisions of the Original Certificate, was filed with the Secretary of State of the State of Delaware on February 8, 2021.

3. This Second Amended and Restated Certificate of Incorporation (this “Second Amended and Restated Certificate”), which both restates and amends the provisions of the Amended and Restated Certificate, was duly adopted in accordance with Sections 228, 242 and 245 of the General Corporation Law of the State of Delaware, as amended from time to time (the “DGCL”).

4. This Second Amended and Restated Certificate shall become effective on the date of filing with the Secretary of State of Delaware.

5. The text of the Amended and Restated Certificate is hereby restated and amended in its entirety to read as follows:

ARTICLE I

NAME

The name of the corporation is Fast Radius, Inc. (the “Corporation”).

ARTICLE II

PURPOSE

The purpose of the Corporation is to engage in any lawful act or activity for which corporations may be organized under the DGCL as it now exists or may hereafter be amended and supplemented. In addition to the powers and privileges conferred upon the Corporation by law and those incidental thereto, the Corporation shall possess and may exercise all of the powers and privileges that are necessary or convenient to the conduct, promotion or attainment of the business or purposes of the Corporation.

ARTICLE III

REGISTERED AGENT

The address of the Corporation’s registered office in the State of Delaware is 251 Little Falls Drive, in the City of Wilmington, County of New Castle, Delaware, 19808, and the name of the Corporation’s registered agent at such address is Corporation Service Company.

ARTICLE IV

CAPITALIZATION

Section 4.1 Authorized Capital Stock. The total number of shares of all classes of capital stock, each with a par value of $0.0001 per share, which the Corporation is authorized to issue is __________ shares, consisting of (a) __________ shares of common stock (the “Common Stock”) and (b) __________ shares of preferred stock, par value $0.0001 per share (the “Preferred Stock”).

Section 4.2 Preferred Stock. The Board of Directors of the Corporation (the “Board”) is hereby expressly authorized to provide out of the unissued shares of the Preferred Stock for one or more series of Preferred Stock and to establish from time to time the number of shares to be included in each such series and to fix the voting rights, if any, designations, powers, preferences and relative participating, optional, or other special rights, if any, of each such series and any qualifications, limitations and restrictions thereof, including without limitation thereof, dividend rights, conversion rights, redemption privileges and liquidation preferences, and to increase or decrease (but not below the number of shares of such series then outstanding) the number of shares of any series as shall be stated in the resolution or resolutions adopted by the Board providing for the issuance of such series and included in a certificate of designation (a “Preferred Stock Designation”) filed pursuant to the DGCL, and the Board is hereby expressly vested with the authority to the full extent provided by law, now or hereafter, to adopt any such resolution or resolutions. Without limiting the generality of the foregoing, the resolution or resolutions providing for the creation and issuance of any series of Preferred Stock may provide that such series shall be superior or rank equally or be junior to any other series of Preferred Stock to the extent permitted by law and this Second Amended and Restated Certificate (including any Preferred Stock Designation). Except as otherwise required by law, holders of any series of Preferred Stock shall be entitled only to such voting rights, if any, as shall expressly be granted thereto by this Second Amended and Restated Certificate (including any Preferred Stock Designation).

Section 4.3 Common Stock.

(a) Reclassification. Effective immediately upon the filing of this Second Amended and Restated Certificate with the Secretary of State of the State of Delaware (the “Effective Time”), automatically and without further action on the part of holders of capital stock of the Corporation, each share of Class A Common Stock, par value $0.0001 per share, and each share of Class B Common Stock, par value $0.0001 per share, outstanding or held by the

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Corporation as treasury stock as of immediately prior to the Effective Time (collectively, the “Old Common Stock”) shall be reclassified as, and become, one (1) validly issued, fully paid and non-assessable share of Common Stock (the “Reclassification”). The Reclassification shall occur automatically as of the Effective Time without any further action by the Corporation or the holders of the shares affected thereby and whether or not any certificates representing such shares are surrendered to the Corporation. Upon the Effective Time, each certificate that as of immediately prior to the Effective Time represented shares of Old Common Stock shall be deemed to represent an equivalent number of shares of Common Stock. The Reclassification shall also apply to any outstanding securities or rights convertible into, or exchangeable or exercisable for, Old Common Stock of the Corporation and all references to the Old Common Stock in agreements, arrangements, documents and plans relating thereto or any option or right to purchase or acquire shares of Old Common Stock shall be deemed to be references to the Common Stock or options or rights to purchase or acquire shares of Common Stock, as the case may be.

(b) Voting.

(i) Except as otherwise required by law or this Second Amended and Restated Certificate (including any Preferred Stock Designation), the holders of the shares of Common Stock shall exclusively possess all voting power with respect to the Corporation.

(ii) Except as otherwise required by law or this Second Amended and Restated Certificate (including any Preferred Stock Designation), the holders of shares of Common Stock shall be entitled to one (1) vote for each such share on each matter properly submitted to the stockholders of the Corporation on which the holders of such Common Stock are entitled to vote.

(iii) Except as otherwise required by law or this Second Amended and Restated Certificate (including any Preferred Stock Designation), at any annual or special meeting of the stockholders of the Corporation, holders of the Common Stock shall have the exclusive right to vote for the election of directors and on all other matters properly submitted to a vote of the stockholders of the Corporation. Notwithstanding the foregoing, except as otherwise required by law or this Second Amended and Restated Certificate (including any Preferred Stock Designation), holders of shares of any series of Common Stock shall not be entitled to vote on any amendment to this Second Amended and Restated Certificate (including any amendment to any Preferred Stock Designation) that relates solely to the rights, powers, preferences (or the qualifications, limitations or restrictions thereof) or other terms of one or more outstanding series of Preferred Stock or other series of Common Stock if the holders of such affected series of Preferred Stock or Common Stock, as applicable, are entitled, either separately or together with the holders of one or more other such series, to vote thereon pursuant to this Second Amended and Restated Certificate (including any Preferred Stock Designation) or the DGCL.

(c) Dividends. Subject to applicable law and the rights, if any, of the holders of any outstanding series of Preferred Stock, the holders of shares of Common Stock shall be entitled to receive such dividends and other distributions (payable in cash, property or capital stock of the Corporation) when, as and if declared thereon by the Board from time to time out of any assets or funds of the Corporation legally available therefor and shall share equally on a per share basis in such dividends and distributions.

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(d) Liquidation, Dissolution or Winding Up of the Corporation. Subject to applicable law and the rights, if any, of the holders of any outstanding series of Preferred Stock, in the event of any voluntary or involuntary liquidation, dissolution or winding up of the Corporation, after payment or provision for payment of the debts and other liabilities of the Corporation, the holders of shares of Common Stock shall be entitled to receive all the remaining assets of the Corporation available for distribution to its stockholders, ratably in proportion to the number of shares of Common Stock held by them.

Section 4.4 Rights and Options. The Corporation has the authority to create and issue rights, warrants and options entitling the holders thereof to acquire from the Corporation any shares of its capital stock of any class or classes, with such rights, warrants and options to be evidenced by or in instrument(s) approved by the Board. The Board is empowered to set the exercise price, duration, times for exercise and other terms and conditions of such rights, warrants or options; provided, however, that the consideration to be received for any shares of capital stock issuable upon exercise thereof may not be less than the par value thereof.

Section 4.5 No Class Vote on Changes in Authorized Number of Shares of Stock. The number of authorized shares of any series, class or classes of capital stock may be increased or decreased (but not below the number of shares of such series, class or classes thereof then outstanding) by the affirmative vote of the holders of a majority of the voting power of the capital stock of the Corporation entitled to vote generally in the election of directors, irrespective of the provisions of Section 242(b)(2) of the DGCL (or any successor provision thereto), voting together as a single class, without a separate vote of the holders of the series, class or classes the number of authorized shares of which are being increased or decreased, unless a vote by any holders of one or more series of Preferred Stock is required by the express terms of any Preferred Stock Designation.

ARTICLE V

BOARD OF DIRECTORS

Section 5.1 Board Powers. The business and affairs of the Corporation shall be managed by, or under the direction of, the Board. In addition to the powers and authority expressly conferred upon the Board by statute, this Second Amended and Restated Certificate, as it may be further amended from time to time, or the Amended and Restated Bylaws of the Corporation (as amended from time to time in accordance with the provisions hereof and thereof, the “Bylaws”), the Board is hereby empowered to exercise all such powers and do all such acts and things as may be exercised or done by the Corporation, subject, nevertheless, to the provisions of the DGCL and this Second Amended and Restated Certificate.

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Section 5.2 Number, Election and Term.

(a) The number of directors of the Corporation, other than those who may be elected by the holders of one or more series of Preferred Stock voting separately by class or series, shall be fixed from time to time in the manner provided in the Bylaws.

(b) Subject to Section 5.5, the Board shall be divided into three classes, as nearly equal in number as possible and designated as Class I, Class II and Class III. The Board is authorized to assign members of the Board already in office as of the effectiveness of this Second Amended and Restated Certificate to Class I, Class II or Class III. The term of the initial Class I Directors shall expire at the first annual meeting of the stockholders of the Corporation following the effectiveness of this Second Amended and Restated Certificate; the term of the initial Class II Directors shall expire at the second annual meeting of the stockholders of the Corporation following the effectiveness of this Second Amended and Restated Certificate; and the term of the initial Class III Directors shall expire at the third annual meeting of the stockholders of the Corporation following the effectiveness of this Second Amended and Restated Certificate. At each succeeding annual meeting of the stockholders of the Corporation, beginning with the first annual meeting of the stockholders of the Corporation following the effectiveness of this Second Amended and Restated Certificate, each of the successors elected to replace the class of directors whose term expires at that annual meeting shall be elected for a three-year term or until the election and qualification of their respective successors in office, subject to their earlier death, resignation, disqualification or removal. Subject to Section 5.5, if the number of directors that constitute the Board is changed, any increase or decrease shall be apportioned by the Board among the classes so as to maintain the number of directors in each class as nearly equal as possible, but in no case shall a decrease in the number of directors constituting the Board shorten the term of any incumbent director. Subject to the rights of the holders of one or more series of Preferred Stock, voting separately by class or series, to elect directors pursuant to the terms of one or more series of Preferred Stock, directors shall be elected by a plurality of the votes cast by the stockholders of the Corporation present in person or represented by proxy at the meeting and entitled to vote thereon. The Board is hereby expressly authorized, by resolution or resolutions thereof, to assign members of the Board already in office to the aforesaid classes at the time this Second Amended and Restated Certificate (and therefore such classification) becomes effective in accordance with the DGCL.

(c) Subject to Section 5.5, a director shall hold office until the annual meeting for the year in which his or her term expires and until his or her successor has been elected and qualified, subject, however, to such director’s earlier death, resignation, retirement, disqualification or removal. There shall be no limit on the number of terms a director may serve on the Board.

(d) Unless and except to the extent that the Bylaws shall so require, the election of directors need not be by written ballot. There is no cumulative voting with respect to the election of directors.

Section 5.3 Newly Created Directorships and Vacancies. Subject to Section 5.5, newly created directorships resulting from an increase in the number of directors and any vacancies on the Board resulting from death, resignation, retirement, disqualification, removal or other cause may be filled solely and exclusively by a majority vote of the remaining directors then in office, even if less than a quorum, or by a sole remaining director (and not by

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stockholders of the Corporation ), and any director so chosen shall hold office for the remainder of the full term of the class of directors to which the new directorship was added or in which the vacancy occurred and until his or her successor has been elected and qualified, subject, however, to such director’s earlier death, resignation, retirement, disqualification or removal.

Section 5.4 Removal; Resignation. Subject to Section 5.5 and except as otherwise required by law, any or all of the directors may be removed from office at any time, but only for cause and only by the affirmative vote of holders of at least two-thirds (66 and 2/3%) of the voting power of all then outstanding shares of capital stock of the Corporation entitled to vote generally in the election of directors, voting together as a single class. Any director may resign at any time upon written notice to the Corporation.

Section 5.5 Preferred Stock—Directors. Notwithstanding any other provision of this Article V, and except as otherwise required by law, whenever the holders of one or more series of Preferred Stock shall have the right, voting separately by class or series, to elect one or more directors, the term of office, the filling of vacancies, the removal from office and other features of such directorships shall be governed by the terms of such series of Preferred Stock as set forth in this Second Amended and Restated Certificate (including any Preferred Stock Designation) and such directors shall not be included in any of the classes created pursuant to this Article V unless expressly provided by such terms.

ARTICLE VI

BYLAWS

In furtherance and not in limitation of the powers conferred upon it by law, the Board shall have the power and is expressly authorized to adopt, amend, alter or repeal the Bylaws by the affirmative vote of a majority of the total number of directors present at a regular or special meeting of the Board at which there is a quorum or by unanimous written consent. The Bylaws also may be adopted, amended, altered or repealed by the stockholders of the Corporation; provided, however, that in addition to any vote of the holders of any class or series of capital stock of the Corporation required by law or by this Second Amended and Restated Certificate (including any Preferred Stock Designation), the affirmative vote of the holders of at least two-thirds (66 and 2/3%) of the voting power of all then outstanding shares of capital stock of the Corporation entitled to vote generally in the election of directors, voting together as a single class, shall be required for the stockholders of the Corporation to adopt, amend, alter or repeal the Bylaws; and provided further, however, that no Bylaws hereafter adopted by the stockholders of the Corporation shall invalidate any prior act of the Board that would have been valid if such Bylaws had not been adopted.

ARTICLE VII

SPECIAL MEETINGS OF STOCKHOLDERS; ACTION BY WRITTEN CONSENT

Section 7.1 Special Meetings. Subject to the rights, if any, of the holders of any outstanding series of Preferred Stock, and to the requirements of applicable law, special meetings of stockholders of the Corporation may be called only by the Chairman of the Board, the Chief Executive Officer of the Corporation, or the Board pursuant to a resolution adopted by a majority of the Board, and the ability of the stockholders of the Corporation to call a special meeting is hereby specifically denied. Except as provided in the foregoing sentence, special meetings of stockholders of the Corporation may not be called by another person or persons.

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Section 7.2 Advance Notice. Advance notice of stockholder nominations for the election of directors and of business to be brought by stockholders of the Corporation before any meeting of the stockholders of the Corporation shall be given in the manner provided in the Bylaws.

Section 7.3 Action by Written Consent. Except as otherwise expressly provided for or fixed pursuant to any Preferred Stock Designation permitting the holders of one or more series of Preferred Stock to act by written consent, any action required or permitted to be taken by the stockholders of the Corporation must be effected by a duly called annual or special meeting of such stockholders and may not be effected by written consent of the stockholders.

ARTICLE VIII

LIMITED LIABILITY; INDEMNIFICATION

Section 8.1 Limitation of Director Liability. A director of the Corporation shall not be personally liable to the Corporation or its stockholders for monetary damages for breach of fiduciary duty as a director, except to the extent such exemption from liability or limitation thereof is not permitted under the DGCL, as the same exists or may hereafter be amended, unless a director violated his or her duty of loyalty to the Corporation or its stockholders, acted in bad faith, knowingly or intentionally violated the law, authorized unlawful payments of dividends, unlawful stock purchases or unlawful redemptions, or derived improper personal benefit from his or her actions as a director. Any amendment, modification or repeal of the foregoing sentence shall not adversely affect any right or protection of a director of the Corporation hereunder in respect of any act or omission occurring prior to the time of such amendment, modification or repeal.

Section 8.2 Indemnification and Advancement of Expenses.

(a) To the fullest extent permitted by the applicable laws of the State of Delaware, as the same exists or may hereafter be amended, the Corporation shall indemnify and hold harmless each person who is or was made a party or is threatened to be made a party to or is otherwise involved in any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative, including an action by or in the right of the Corporation to procure a judgment in its favor (a “proceeding”), by reason of the fact that he or she is or was a director or officer of the Corporation or, while a director or officer of the Corporation, is or was serving at the request of the Corporation as a director, officer, employee or agent of another corporation or of a partnership, joint venture, trust, other enterprise or nonprofit entity, including service with respect to an employee benefit plan (an “indemnitee”), whether the basis of such proceeding is alleged action in an official capacity as a director, officer, employee or agent, or in any other capacity while serving as a director, officer, employee or agent, against all liability and loss suffered and expenses (including, without limitation, attorneys’ fees and disbursements, judgments, fines, ERISA excise taxes, damages, claims and penalties and amounts paid in settlement) reasonably incurred by such indemnitee in connection with such proceeding. The Corporation shall to the fullest extent not prohibited by applicable

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law pay the expenses (including attorneys’ fees) incurred by an indemnitee in defending or otherwise participating in any proceeding in advance of its final disposition; provided, however, that, to the extent required by applicable law, such payment of expenses in advance of the final disposition of the proceeding shall be made only upon receipt of an undertaking, by or on behalf of the indemnitee, to repay all amounts so advanced if it shall ultimately be determined that the indemnitee is not entitled to be indemnified under this Section 8.2 or otherwise. The rights to indemnification and advancement of expenses conferred by this Section 8.2 shall be contractual rights and such rights shall continue as to an indemnitee who has ceased to be a director, officer, employee or agent and shall inure to the benefit of his or her heirs, executors and administrators. Notwithstanding the foregoing provisions of this Section 8.2(a), except for proceedings to enforce rights to indemnification and advancement of expenses, the Corporation shall indemnify and advance expenses to an indemnitee in connection with a proceeding (or part thereof) initiated by such indemnitee only if such proceeding (or part thereof) was authorized by the Board.

(b) The rights to indemnification and advancement of expenses conferred on any indemnitee by this Section 8.2 shall not be exclusive of any other rights that any indemnitee may have or hereafter acquire under law, this Second Amended and Restated Certificate, as it may be further amended from time to time, the Bylaws, an agreement, vote of stockholders of the Corporation or disinterested directors, or otherwise.

(c) Any repeal or amendment of this Section 8.2 by the stockholders of the Corporation or by changes in law, or the adoption of any other provision of this Second Amended and Restated Certificate inconsistent with this Section 8.2, shall, unless otherwise required by law, be prospective only (except to the extent such amendment or change in law permits the Corporation to provide broader indemnification rights on a retroactive basis than permitted prior thereto), and shall not in any way diminish or adversely affect any right or protection existing at the time of such repeal or amendment or adoption of such inconsistent provision in respect of any proceeding (regardless of when such proceeding is first threatened, commenced or completed) arising out of, or related to, any act or omission occurring prior to such repeal or amendment or adoption of such inconsistent provision.

(d) This Section 8.2 shall not limit the right of the Corporation, to the extent and in the manner authorized or permitted by law, to indemnify and to advance expenses to persons other than indemnitees.

ARTICLE IX

CORPORATE OPPORTUNITY

Section 9.1 To the extent allowed by law, the doctrine of corporate opportunity, or any other analogous doctrine, shall not apply with respect to the Corporation or any of its directors, and the Corporation renounces any expectancy that any of the directors of the Corporation will offer any such corporate opportunity of which he or she may become aware to the Corporation, except, the doctrine of corporate opportunity shall apply with respect to any of the directors of the Corporation only with respect to a corporate opportunity that was offered to such person solely in his or her capacity as a director or officer of the Corporation and such opportunity is one the Corporation is legally and contractually permitted to undertake and would otherwise be reasonable for the Corporation to pursue, and to the extent the director is permitted to refer that opportunity to the Corporation without violating any legal obligation.

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Section 9.2 Neither the alteration, amendment, addition to or repeal of this Article IX, nor the adoption of any provision of this Second Amended and Restated Certificate (including any Preferred Stock Designation) inconsistent with this Article IX, shall eliminate or reduce the effect of this Article IX in respect of any business opportunity first identified or any other matter occurring, or any cause of action, suit or claim that, but for this Article IX, would accrue or arise, prior to such alteration, amendment, addition, repeal or adoption. This Article IX shall not limit any protections or defenses available to, or indemnification or advancement rights of, any director or officer of the Corporation under this Second Amended and Restated Certificate, the Bylaws or applicable law.

ARTICLE X

AMENDMENT OF SECOND AMENDED AND RESTATED CERTIFICATE OF INCORPORATION

The Corporation reserves the right at any time and from time to time to amend, alter, change or repeal any provision contained in this Second Amended and Restated Certificate (including any Preferred Stock Designation), and other provisions authorized by the laws of the State of Delaware at the time in force that may be added or inserted, in the manner now or hereafter prescribed by this Second Amended and Restated Certificate and the DGCL; and, except as set forth in Article VIII, all rights, preferences and privileges of whatever nature herein conferred upon stockholders of the Corporation, directors or any other persons by and pursuant to this Second Amended and Restated Certificate in its present form or as hereafter amended are granted subject to the right reserved in this Article X.

ARTICLE XI

EXCLUSIVE FORUM FOR CERTAIN LAWSUITS

Section 11.1 Forum. Unless the Corporation consents in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware (the “Court of Chancery”) shall, to the fullest extent permitted by law, be the sole and exclusive forum for any stockholder (including a beneficial owner) to bring (i) any derivative action or proceeding brought on behalf of the Corporation, (ii) any action asserting a claim of breach of a fiduciary duty owed by any director, officer, employee or agent of the Corporation to the Corporation or the Corporation’s stockholders, or any claim for aiding and abetting any such alleged breach, (iii) any action asserting a claim against the Corporation, its directors, officers or employees arising pursuant to any provision of the DGCL or this Second Amended and Restated Certificate or the Bylaws, (iv) any action asserting a claim against the Corporation, its directors, officers or employees governed by the internal affairs doctrine, or (v) any action asserting an “internal corporate claim” as such term is defined in Section 115 of the DGCL, except for, as to each of (i) through (v) above, any claim (A) as to which the Court of Chancery determines that there is an indispensable party not subject to the jurisdiction of the Court of Chancery (and the indispensable party does not consent to the personal jurisdiction of the Court of Chancery within ten days following such determination), (B) which is vested in the exclusive jurisdiction of a court or forum other than the Court of Chancery, or (C) for which the Court of Chancery does not have subject matter

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jurisdiction, as to which the Court of Chancery and the federal district court for the District of Delaware shall concurrently be the sole and exclusive forums; and subject to the preceding provisions of this Section 11.1, the federal district courts of the United States of America shall be the exclusive forum for the resolution of any complaint asserting a cause of action arising under the Securities Act of 1933, as amended.

Section 11.2 Consent to Jurisdiction. If any action the subject matter of which is within the scope of Section 11.1 immediately above is filed in a court other than a court located within the State of Delaware (a “Foreign Action”) in the name of any stockholder, such stockholder shall be deemed to have consented to (i) the personal jurisdiction of the state and federal courts located within the State of Delaware in connection with any action brought in any such court to enforce Section 11.1 immediately above (an “FSC Enforcement Action”) and (ii) having service of process made upon such stockholder in any such FSC Enforcement Action by service upon such stockholder’s counsel in the Foreign Action as agent for such stockholder.

Any person or entity purchasing or otherwise acquiring or holding any interest in any security of the Corporation shall be deemed to have notice of and consented to this Article XI. Notwithstanding the foregoing, the provisions of this Article XI shall not apply to suits brought to enforce any liability or duty created by the Securities Exchange Act of 1934, as amended, or any other claim for which the federal courts of the United States have exclusive jurisdiction.

ARTICLE XII

BUSINESS COMBINATIONS WITH INTERESTED STOCKHOLDERS

The Corporation expressly elects not to be bound or governed by, or otherwise subject to, Section 203 of the DGCL.

ARTICLE XIII

SEVERABILITY

If any provision or provisions (or any part thereof) of this Second Amended and Restated Certificate shall be held to be invalid, illegal or unenforceable as applied to any person or entity or circumstance for any reason whatsoever, then, to the fullest extent permitted by law, (i) the validity, legality and enforceability of such provisions in any other circumstance and of the remaining provisions of this Second Amended and Restated Certificate (including, without limitation, each portion of any paragraph of this Second Amended and Restated Certificate containing any such provision held to be invalid, illegal or unenforceable that is not itself held to be invalid, illegal or unenforceable) and the application of such provision to other persons or entities and circumstances shall not in any way be affected or impaired thereby, and (ii) the provisions of this Second Amended and Restated Certificate (including, without limitation, each portion of any paragraph of this Second Amended and Restated Certificate containing any such provision held to be invalid, illegal or unenforceable) shall be construed so as to permit the Corporation to protect its directors, officers, employees and agents from personal liability in respect of their faith service or for the benefit of the Corporation to the fullest extent permitted by law.

[Signature page follows]

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IN WITNESS WHEREOF, ECP Environmental Growth Opportunities Corp. has caused this Second Amended and Restated Certificate of Incorporation to be duly executed and acknowledged in its name and on its behalf by an authorized officer as of the date first set forth above.

[Signature Page to Second Amended and Restated Certificate of Incorporation]