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What is air pollution, and what are the causes of it?
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Air pollution is the presence of harmful substances in the atmosphere. These can be gases or particles that come from a variety of sources, such as factories, vehicles, burning fossil fuels, and deforestation. The most common types of air pollution include particulate matter (PM), ground-level ozone (O3), carbon monoxide (CO), sulfur dioxide (SO2), nitrogen oxides (NOx), and volatile organic compounds (VOCs). These pollutants can cause health problems such as asthma attacks, heart disease, and lung damage.