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Pollution refers to the contamination of the natural environment by harmful substances or activities that adversely affect living organisms and ecological balance. It is mainly categorized into several types based on the medium in which the contamination occurs. Air pollution occurs when harmful gases, dust, smoke, and particulate matter are released into the atmosphere. Major sources include industrial emissions, vehicle exhaust, burning of fossil fuels, and agricultural activities. Pollutants such as ________ _______ _______ ___ _______ ______ ___ ______.
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