A staple of backyard barbecues and summer time snacks, watermelon is also a promising new source of renewable energy.

According to a new study, leftover watermelons from farms’ harvests could be converted into up to 9.4 million liters (2.5 million gallons) of clean, renewable ethanol fuel every year destined for your car, truck, or airplane’s gas tank.

(read more @ Discovery News – btw, the shoes in the picture are a special 2009 Spring edition by Vans and unfortunately they’re no longer available)