Coffee beans have a high (11-20%) oil content, which can be extracted from the coffee grounds to create biodiesel. Global java production is nowhere near high enough to power everyone, but it could create up to 340 million gallons a year, according to a study- from stuff that has previously been considered waste or compost. People are going to carry on finding clever ways to use stuff rather than sending it to the dump, and that can only be a good thing.
Technorati tag: Biodiesel