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Beyond the Barrel: The Race to Fuel the Future

Quiz: QUIZ: Alternative Energy

American dependence on fossil fuel may soon become unsustainable. Besides being damaging to the environment, it's often imported by nations with whom our diplomatic relationship is prickly at best. But the most compelling reason to look elsewhere for our energy needs is that oil itself is a finite resource, and some believe that a permanent decline in its production is just around the corner. Now more than ever, these people argue, it's time to come up with a plan B.

Fortunately, alternative energy sources already exist with the potential to improve the situation. Some derive from little known, cutting-edge technologies, and some date back to the ancient Romans. But they all add up to the possibility of a future in which American reliance on foreign oil is minimized, if not eliminated.

How much do you know about alternative energy? Take our quiz and find out.

Posted 21 April 2010