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Acid rain refers to precipitation in the form of rain, snow, sleet, or fog that contains high levels of acidic components, primarily sulfuric acid and nitric acid. It occurs when sulfur dioxide (SO₂) and nitrogen oxides (NOₓ) are released into the atmosphere from human activities such as burning fossil fuels, industrial emissions, and vehicle exhaust. These gases react with water vapor, oxygen, and __________ __________ ______ ____ _________ _________ ____.
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