Alternative Energy Sources (Science at the Edge)

“The ethanol plants of today will be the biorefineries of tomorrow. The days of big oil are coming to an end.” Did you know that the Earth’s known supply of oil and gas will last only another 30 to 50 years? And that instead of using less of these disappearing resources, we are actually using more every year? So, are there any alternatives that are cheap, renewable, and won’t harm the world we live in? Science at the Edge: Alternative Energy Sources looks at the different options for replacing f

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