II 118th CONGRESS 1st Session S. 661 IN THE SENATE OF THE UNITED STATES March 6, 2023 Mr. Markey (for himself, Mr. Merkley , and Mr. Sanders ) introduced the following bill; which was read twice and referred to the Committee on Environment and Public Works A BILL To require an interagency study on the environmental and energy impacts of crypto-asset mining, to assess crypto-asset mining compliance with the Clean Air Act, and for other purposes.