Hey, It's FuelDon't Worry About Where It Comes From

As researchers worldwide scramble to find alternatives to oil, they're beginning to make use of some pretty unusual raw materials

Talk about natural resources—it turns out that just about any kind of plant or animal waste, and many kinds of garbage, can be turned into biofuels or other sources of clean energy for cars, trucks, or industry. Here are some of the least expected possibilities being tested.

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