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Air pollution is the introduction of particulates, biological molecules, or other harmful materials into Earth's atmosphere, causing diseases, allergies, death to humans, damage to other living organisms such as animals and food crops, or the natural or built environment.
Air Pollution. Air pollution consists of solid particles and gases. Many pollutants are carcinogens. People who breathe in these poisons are at a higher risk for asthma and reproductive-system damage. According the the U.S. Environmental Protection Agency, birth defects can also be caused by air pollution. (see References 1) A 1995 study found a link between air pollution and increased deaths from cardiovascular and respiratory problems (see References 2).