Fuel Up With Banana Peels

What if we could double the energy efficiency of coal and reduce the United States' dependence on foreign oil? Carbon fuel cells, derived from biowaste and bananas, may do the trick. By Cyrus Farivar.

Mad scientist Doc Brown powers his time machine by feeding coffee grounds and other biowaste into the DeLorean in Back to the Future.

The process is 70 percent efficient, double that of traditional coal power plants, according to Larry Dubois, vice president of the physical sciences division at SRI. ...

Source: Wired News