On January 7, 1965, Senator Edmund S. Muskie (D-ME), chair of the Special Air and Water Pollution Subcommittee of the Senate Public Works Committee, introduced S. 306 with 20 cosponsors. The bill was based on findings of a 1964 report of Muskie’s subcommittee, “Steps Toward Cleaner Air.” S. 306 called for the establishment of minimum national standards limiting exhaust emissions of air pollutants from gasoline-powered motor vehicles. S. 306 also authorized grants to municipalities for construction of solid waste disposal facilities.