chemical driver Air Pollution ENVO:02500037 OMIT:0001823 A chemical driver that is air pollution, that is composed of a mixture of chemical and particulate matter pollutants in outdoor air, including but not limited to carbon monoxide, ozone, sulfur dixoide, nitrogen dioxide, lead, and fine partiuculate matter. Vehicle emissions, fuel oils and natural gas to heat homes, by-products of manufacturing and power generation, particularly coal-fueled power plants, and fumes from chemical production are the primary sources of human-made air pollution. A pollution process during which particulates or other contaminants are released into a portion of air.