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The U.S. burns 900 million metric tons of coal per year. The combustion produces billions of tons of CO2, but also more than 100 million metric tons of coal ash , which includes nasty stuff like mercury and lead.

Recent exploration of rare volcanic rocks in the rugged, dangerous desert of southern Afghanistan has identified world-class concentrations of rare earth elements, the prized group of raw materials that are essential in the manufacture of many modern technologies, from electric cars to solar panels. So far, geologists say, they have mapped one million metric tons of these critical elements, which include lanthanum, cerium and neodymium

By Nina Chestney and Jackie Cowhig LONDON (Reuters) - Germany's plan to shut all its nuclear power plants by 2022 will add up to 40 million metric tons of carbon dioxide emissions annually as the country turns to fossil fuels, analysts said on Tuesday. [More]

COCODRIE, La.--Eating at North America's southern rim, where the land fades into the water, demands a stomach for seafood particularly shrimp, crab and fish, such as sea bass.