How do fossil-fuel power plants contribute to air pollution and acid rain?
The ingenuity people used in harnessing waterpower can be seen in this medieval-style mill. The waterwheel is turned by a stream and is connected to a shaft that leads into the building. At the other end of the shaft is a gear. The connection of a series of gears translates the power from the stream to a shaft that drives a millstone, which grinds flour from grain.
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Fossil-fuel power plants contribute to air pollution and acid rain primarily through the combustion of fuels like coal, oil, and natural gas. This process releases primary pollutants, including sulfur dioxide, nitrogen oxides, and particulate matter, into the atmosphere.123
Formation of Acid Rain
Acid rain occurs when these emitted gases react with water, oxygen, and other chemicals in the atmosphere to form sulfuric acid and nitric acid. These acids mix with cloud moisture, significantly lowering the pH of precipitation. Because these pollutants can travel long distances, power plant emissions often affect regions far from their original source.13
Mitigation and Environmental Impact
If left untreated, these emissions degrade local and regional air quality and pose risks to human respiratory health. To address these issues, many facilities employ flue gas treatment technologies, such as scrubbers and electrostatic precipitators, to capture pollutants before they are released. While these technologies can remove a high percentage of harmful substances, their implementation varies globally, and the combustion of fossil fuels remains a major driver of global warming due to the release of carbon dioxide.432