Several years ago, researchers took advantage of a natural experiment to learn about the impact on pediatric asthma of decreased traffic levels and improved air quality. Pollutants of major public health concern include particulate matter, carbon monoxide, ozone, nitrogen dioxide and sulfur dioxide. Particulate matter is singlehandedly responsible for up to 85,555 premature deaths each year. Household combustion devices, motor vehicles, industrial facilities and forest fires are common sources of air pollution. The health risks of air pollution are extremely serious. S. Nearly one half of all Americans—an estimated 655 million—live in areas that don’t meet.
Passenger vehicles are a major pollution contributor, producing significant amounts of nitrogen oxides, carbon monoxide, and other pollution. Still breathe air dirty enough to cause health problems, according to an. In 7568, transportation contributed more than half of the carbon monoxide and nitrogen oxides, and almost a quarter of the hydrocarbons emitted into our air. At the same time, children s emergency room visits for causes other than asthma did not change.