What is air pollution?
Air pollution is the introduction of chemicals, particulate matter, or biological materials that cause harm or discomfort to humans or other living organisms, or damages the natural environment, into the atmosphere.
Url: http://en.wikipedia.org/wiki/Air_pollution
What are the causes?
burning of fossil fuels such as coal and gasoline
Carbon dioxide is one the main pollutants that causes air pollution. This is because, although living beings do exhale carbon dioxide, this gas is harmful when emitted from other sources, which are caused due to human activity
Sulfur dioxide is yet another harmful pollutant that causes air pollution. Sulfur dioxide is emitted largely to the excessive burning of fossil fuels, petroleum refineries, chemical and coal burning power plants

What are the effects?
The human health effects of poor air quality are far reaching, but principally affect the Pollution Damage to Plants

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