If researchers at the University of Nevada prove successful, America's growing caffeine addiction may have at least one major plus side. Apparently, used coffee grounds are between 10- and 15 percent oil, and that's a potential source of energy. Even better, the oil is apparently easy to extract, so experts suggest that the resulting biodiesel could be priced as low as $1 dollar a gallon, which is quite a bit better than what petroleum-based diesel fuel is selling for, even after recent price drops.

Sure, there may not be enough spent coffee beans around the world to completely displace our dependence on petroleum, but every little bit helps. Perhaps the best bit of news is that the fuel retains its coffee smell, and that's reason enough for us to get behind the idea. Thanks for the tip, Luke!

[Source: Consumer Energy Report]