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How do fossil fuels cause air pollution?

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Most of this air pollution we cause results from the burning of fossil fuels, such as coal, oil, natural gas, and gasoline to produce electricity and power our vehicles. Although fossil fuels are mainly composed of carbon, it contains impurities such as Sulphur and nitrogen atoms. As the fuel gets burnt Sulphur and nitrogen combine with oxygen to form Sulphur dioxide (SO2) and nitrogen oxide respectively which gets released into the air, contributing to the formation of smog and acid rain. The most common nitrogen-related compounds emitted into the air by human activities are collectively referred to as nitrogen oxides. Ammonia is another nitrogen compound emitted into the air, primarily from agricultural activities, but also from fossil fuels. Most of the nitrogen oxides released due to human activity are from the burning of fossil fuels associated with transportation and industry.

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