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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.
The pollutants released into the atmosphere cause local air pollution (see Table of Common Pollutants). However, they also cause regional air pollution, as with huge plumes of smoke covering a large area, and acid rain.n some cases, air pollutants contribute to climate change, and greenhouse gases contribute to air pollution: 1  Air pollutants such as ground-level ozone and soot (a portion of particulate matter) contribute directly to global warming, which is linked to climate change.