Pollution

Pollution [r]: Contamination of the natural environment, which usually affects the growth or behaviour of animals and plants, causes health hazards, or leads to other negative consequences. [e]

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* Air pollution [r]: The presence of contaminants or pollutant substances in the air (air pollutants) that interfere with human health or welfare, or produce other harmful environmental effects. [e]
* Light pollution [r]: Add brief definition or description
* Noise pollution [r]: Add brief definition or description
* Soil contamination [r]: Add brief definition or description
* Water pollution [r]: Add brief definition or description