SDAC Sustainable Development Acquisition I Corporation

On December 21, 2022, Sustainable Development Acquisition I Corp. (the “Company”) issued an unsecured promissory note (the “Note”) in the principal amount of up to $550,000 to Sustainable Development Sponsor, LLC (the “Sponsor”). The Note does not bear interest (other than interest applicable to late payments) and is repayable in full upon consummation of the Company’s initial business combination (a “Business Combination”). If the Company does not complete a Business Combination, the Note shall not be repaid and all amounts owed under it will be forgiven. Upon the consummation of a Business Combination, the Sponsor shall have the option, but not the obligation, to convert up to the principal balance of the Note to warrants of the Company, at a price of $1.00 per warrant (the “Warrants”). The terms of the Warrants will be identical to the terms of the warrants issued by the Company to the Sponsor in a private placement that took place simultaneously with the Company’s initial public offering. The Note is subject to customary events of default, the occurrence of which automatically trigger the unpaid principal balance of the Note and all other sums payable with regard to the Note becoming immediately due and payable.

The Note was issued pursuant to the exemption from registration contained in Section 4(a)(2) of the Securities Act of 1933, as amended.

The Note is attached as Exhibit 10.1 to this Current Report on Form 8-K and is incorporated herein by reference. The disclosure set forth in this Item 2.03 is intended to be a summary only and is qualified in its entirety by reference to the Note.