In the search for eco-friendly alternative fuels, scientists at the University of Nevada, Reno, discovered that you could extract the oils from spent coffee grounds and use those to power a car, in much the same manner as other forms of plant-based fuels (like using cooking oil). Yet another nice use for old coffee grounds (composting is my favorite use). Plus, you get the added bonus of coffee-scented exhaust fumes! Read more in the New York Times.