Environment: Washington's Clean Air Cars

Under the Clean Air Act of 1970 Detroit has until 1975 to clean up automobile emissions, the prime source of smog in the nation's skies. As if to set a good example for the automakers, the Government has already begun practicing what the Act preaches. The General Services Administration, which is responsible for the maintenance of 54,000 federally owned vehicles, has converted 1,023 of the autos so that they now use compressed or liquefied natural gas, or butane and propane for fuel. The change reduces the autos' air pollutants by nearly 90%. Eventually...