Soils of northern U.S. forests are high in mercury

PUBS: The carbon-rich soils in northern U.S. forests contain up to 16 times as much mercury as do soils in southern forests, according to a new study conducted in 10 states (Environ. Sci. Technol., DOI: 10.1021/es104384m). Between 5,000 and 8,000 tons of mercury, a toxic metal, enter the atmosphere annually, according to the Environmental Protection Agency. While natural sources, such as volcanoes, emit some of the mercury, much of it originates from industrial sources, such as coal-burning power plants.......

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