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account the full air pollution control air pollution problem air quality automobile average concentration budgeted carbon monoxide levels cars class of air combustion products common class common pollutant commonly found Congress control program control strategies damage diffusion model disturbing incongruities emissions end to air energy to heat engineers environment environmental exposure Federal found an association found in cities fuels full consequences grips with air hydrocarbons immediate years ahead indus legal and administrative levels are going ln the private ln the United malign intention manufactured ment mercury meteorologists mg/m motor vehicle pollution nitrogen oxides ornamental plants oxidant levels particulate levels particulate matter permit system photochemical oxidant pollutant in urban pollution control activities President Nixon problem of air produce public interest seek an end sold in Mexico source of lead space-age standards stationary sulfur dioxide technicians tion training in air urban air urban areas vehicles sold virtually every city