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Opinion: Earth Day at 40 -- Looking Ahead

(April 22) -- Earth Day is a great time to come together to celebrate our environmental successes. It's hard to believe it's been 40 years since the first one. Our country has seen a string of incredible environmental triumphs over the past 40 years. Citizens from across the country have repeatedly come together to demand...

New Way to Make Clean Energy: Cow Manure

(Dec. 18) -- As scientists across the country look to sun and wind to replace fossil fuels, one man is delving into the bowels of our nation's cattle. Anybody who's ever been near a mountain of manure will hesitate to call it "clean" energy, but it just might get the job done. Larry Lehr, an environmental science...

Could New Clean Energy Source Trigger Quakes?

LONDON (Dec. 18) -- The Obama administration has a lot riding on geothermal energy, which it sees as a future source of clean, green and virtually unlimited electricity. Over the past year alone, the U.S. Department of Energy has invested some $440 million in projects trying to turn heat trapped in bedrock deep underground...

Background on CleanEnergy

BMW CleanEnergy vehicles have both a hydrogen and a petrol tank. If one of the tanks is empty, the bivalent BMW engine unit switches over automatically to the other fuel system.

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