) react with Volatile Organic Compounds (VOCs) in the presence of heat and UV radiation. 2. Major Sources of Pollution
: Internal combustion engines in cars, trucks, and airplanes are responsible for up to 80% of urban pollution, emitting COcap C cap O NOxcap N cap O sub x PMcap P cap M Air Quality Control: Formation and Sources, Dis...
: These are emitted directly from an identifiable source. Examples include Carbon Monoxide (CO) from vehicle exhaust, Sulfur Dioxide ( SO2cap S cap O sub 2 ) react with Volatile Organic Compounds (VOCs) in