Utilities across the country are investing in geothermal energy. Geothermal offers 50,000 times more energy contained in the first six miles of the earth's crust than all the world's oil and gas. Last year, $3 billion was invested globally, up 183% from 2006. Dozens of projects are under way in Nevada, and the Bureau of Land Management has plans to open millions of acres of federal land for new geothermal development in the western U.S.

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