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Chemical plant pollution control. View of a pollution control facility at a chemical plant. This facility is designed to reduce the levels of the harmful gases sulphur dioxide and nitrogen dioxide in the escaping flue gas from power stations. Both these chemicals are severe pollutants, and cause acid rain, which destroys plants and wildlife, and can even damage masonry. At high atmospheric concentrations, both are also directly toxic to humans.
Model release not required. Property release not required.