Pollution
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"It isn't pollution that's ruining the environment; it's all the impurities in the air and water that's doing it."-George W. Bush
Pollution is contamination of a system with harmful foreign components.[1]. The most common usage of the word pollution refers to environmental pollution, which is contamination of the air, ground, or water by harmful chemicals, particulate matter, or other impurities. A less common use is noise pollution, which is "contamination" of a quiet space by annoying sounds.