air pollution

air pollution To carry out the Clean Air Act, as amended, and the functions of the Secretary of Health, Education, and Welfare under the provisions of section 48(h) (12) (C) (ii) of the Internal Revenue Code of 1954 (80 Stat. 1508, 1512), including purchase of not to exceed eight passenger motor vehicles, and hire, maintenance, and operation of aircraft, $88,733,000, of which $18,700,000 shall remain available until expended to carry out section 104 of the Clean Air Act.