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...refining processes|petroleum refinery]] in [[Singapore]]. Example of an [[Air pollution emissions|air pollution emission]] source.}} ...ogenic and natural sources sources of air pollution are discussed in the [[Air pollution emissions]] article. In addition, the U.S. Environmental Protection Agency (U.S. EPA)

...ic than unpolluted rain. Innovations for reducing fossil fuel combustion [[Air pollution emissions|emissions]], such as scrubbers upstream of the tall [[flue gas stack]]s on {{see also|Air pollution emissions}}

...ic than unpolluted rain. Innovations for reducing fossil fuel combustion [[Air pollution emissions|emissions]], such as scrubbers upstream of the tall [[flue gas stack]]s on {{see also|Air pollution emissions}}

...ning. [[Combustion]] of [[fossil fuels]] also results in carbon monoxide [[Air pollution emissions|emissions]] to the atmosphere.