Topic Overview
Toxic Air Pollutants and Heavy Metals
Toxic air pollutants, also known as hazardous air pollutants (HAP), are pollutants which can cause serious health and environment effects. Most air toxics originate from anthropogenic sources like mobile sources (e.g., cars, trucks, buses), stationary sources (e.g., factories, refineries, power plants), indoor sources (e.g., some building materials and cleaning solvents), and even released from natural sources such as volcanic eruptions and forest fires. Examples of toxic air pollutants include benzene (in gasoline), perchlorethlyene (in dry cleaning chemicals), methylene cvahloride (in...read more