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Air pollution is a significant environmental problem resulting from the introduction of harmful substances into the atmosphere, which adversely affects human health, ecosystems, and climate. The causes of air pollution are both natural and anthropogenic, with human activities being the primary contributors. Industrialization has led to the release of large quantities of pollutants such as sulfur dioxide, nitrogen oxides, and particulate matter into the air. Power plants burning fossil fuels, factories producing chemicals, and refineries emitting volatile organic compounds are major ______ __________ ____ ____ _________ _____ ______ ___ _______ ___ ___.
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