The greenhouse effect and the consequent destruction of the ozone layer in addition to the cause acid rain, these phenomena that contribute greatly to air pollution are dangerous to the bodies.
Greenhouse Effect

http://www.n-ergise.net/page/climate.cfm
Ozone Layer

http://www.export.gov.il/Eng/_Uploads/4217Environline141.html
Acid Rain

http://science.howstuffworks.com/acid-rain.htm
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