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A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · U · V · W · X · Y · Z   entire Web this site pollution The act or process of polluting or the state of being polluted, especially the contamination of soil, water, or the atmosphere by the discharge of harmful substances called pollutants. Related categories    • ECOLOGY AND THE ENVIRONMENT Also on this site: Encyclopedia of Science Transport Concepts & Designs (partner site) BACK TO TOP