What is air pollution?

The presence of chemicals in the air causes air pollution, which can cause dangerous medical conditions in humans. Find out more! read more

Air pollution occurs when harmful substances including particulates and biological molecules are introduced into Earth's atmosphere. It may cause diseases, allergies or death of humans; it may also cause harm to other living organisms such as animals and food crops, and may damage the natural or built environment. read more

The two most widespread types of air pollution are the aforementioned ozone (smog) and particle pollution (soot), but air pollution also may include serious pollutants such as carbon monoxide, lead, nitrogen dioxide and sulfur dioxide, and toxins such as mercury, arsenic, benzene, formaldehyde and acid gases. read more

Air pollution refers to the release of pollutants into the air that are detrimental to human health and the planet as a whole. The Clean Air Act authorizes the U.S. Environmental Protection Agency (EPA) to protect public health by regulating the emissions of these harmful air pollutants. read more

Defining air pollution is more complicated than you think, but in all forms, it is a serious health risk that requires your attention. Defining air pollution is more complicated than you think, but in all forms, it is a serious health risk that requires your attention. read more