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- W653635522 abstract "MOTOR-VEHICLE EMISSIONS ARE A MAJOR CAUSE OF AIR POLLUTION IN THE UNITED STATES TODAY. THREE MAJOR BASIC SOURCES OF POLLUTION FROM THE MOTOR VEHICLE ARE NOTED: THE TAILPIPE, THE CRANK CASE, AND THE FUEL SYSTEM. TAILPIPE EMISSIONS ARE RESPONSIBLE FOR SOME 65 PERCENT OF THE UNBURNED HYDROCARBONS, AND PRACTICALLY ALL OF THE CARBON MONOXIDE AND NITROGEN OXIDES FROM UNCONTROLLED VEHICLES. ON A NATIONWIDE BASIS, IN 1969, THE MOTOR VEHICLE WAS RESPONSIBLE FOR 44 PERCENT OF ALL PRIMARY POLLUTANTS FOR WHICH NATIONAL AMBIENT AIR QUALITY STANDARDS HAVE BEEN PROMULGATED. THE CLEAN AIR ACT PROVIDES NATIONAL AMBIENT AIR QUALITY STANDARDS FOR SIX POLLUTANTS: SULFUR OXIDES, PARTICULATE MATTER, PHOTOCHEMICAL OXIDANTS, NITROGEN, OXIDE/DIOXIDE, CARBON MONOXIDE, AND HYDROCARBONS. THEY ARE REQUIRED TO BE MET BY THE STATES BY MID 1975, WITH CERTAIN EXCEPTIONS IN THE ATTAINMENT DATE. SECONDARY STANDARDS ARE AIMED AT PROTECTING THE PUBLIC WELFARE AND ARE TO BE ACHIEVED BY THE EARLIEST DATE COMMENSURATE WITH TECHNOLOGICAL AND ECONOMIC FEASIBILITY." @default.
- W653635522 created "2016-06-24" @default.
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- W653635522 date "1972-02-28" @default.
- W653635522 modified "2023-09-27" @default.
- W653635522 title "GENERAL ASSESSMENT OF THE AIR POLLUTION PROBLEM AND PHILOSOPHY UNDERLYING AUTOMOTIVE EMISSION CONTROLS" @default.
- W653635522 hasPublicationYear "1972" @default.
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