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Air pollution from a fossil-fuel power station

Air pollution is the introduction of particulates, biological molecules, or other harmful materials into Earth's atmosphere, causing disease, death to humans, damage to other living organisms such as food crops, or the natural or built environment. Air pollution may come from anthropogenic or natural sources.

The atmosphere is a complex natural gaseous system that is essential to support life on planet Earth. Stratospheric ozone depletion due to air pollution has been recognized as a threat to human health as well as to the Earth's ecosystems.{{ safesubst:#invoke:Unsubst||date=__DATE__ |$B= {{#invoke:Category handler|main}}{{#invoke:Category handler|main}}[citation needed] }}

Indoor air pollution and urban air quality are listed as two of the world's worst toxic pollution problems in the 2008 Blacksmith Institute World's Worst Polluted Places report.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> According to the 2014 WHO report, air pollution in 2012 caused the deaths of around 7 million people worldwide.<ref name=WHO2014>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> {{#invoke:sidebar|sidebar | class = hlist | pretitle = Part of the nature series | title = Weather

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Air pollution sections
Intro  Pollutants  Air pollution exposure  Indoor air quality (IAQ)  Health effects  Agricultural effects  Historical disasters  Alternatives to creating air pollution  Reduction efforts  Regulations  Hotspots  Cities  National-scale air toxics assessments 1995-2005  Governing urban air pollution  Atmospheric dispersion  See also  References  Further reading  External links  

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