what is the definition of pollutants
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a substance that pollutes air, rivers, etc.
प्रदूषक पदार्थ (वायु, नदियों आदि को प्रदूषित करने वाला पदार्थ)
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In addition to their role as ozone precursors, CO, VOCs and NOx are dangerous air pollutants themselves. Major sources of NOx and VOCs include emissions from motor vehicle exhaust, industrial facilities, and chemical solvents. Major sources of methane include waste and the fossil fuel and agricultural industry.
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