This is one of the market approaches to cleaning up air pollution in the Clean Air Act. Information on changes in gasoline will be found in the section on Mobile Sources . Some air pollutants can cause cancer, problems with having children and other very serious illnesses as well as environmental damage. Air toxics are released from sources throughout the country and from motor vehicles. For example, gasoline contains toxic chemicals.
Gases escape from liquid gasoline and form a vapor in a process called vaporization or evaporation .
When cars and trucks burn gasoline, air toxics come out of the tailpipes. Air toxics are released from small stationary sources, such as dry cleaners and auto paint shops Large stationary sources, such as chemical factories and incinerators, also release hazardous air pollutants. The 1990 Clean Air Act deals more strictly with large sources than small ones, but EPA must regulate small sources of hazardous air pollutants as well. To reduce air toxics pollution, EPA must first identify the toxic pollutants whose release should be reduced. The 1970 Clean Air Act gave EPA authority to list air toxics for regulation and then to regulate the chemicals.