Did you know that not all watermelons are sold for food? An incredible one-fifth of watermelons go to waste because they have too many scars or are shaped oddly. Wouldn’t it be great if something could be done with these rejected watermelons?

Wayne Fish, a chemist with the Agricultural Research Service in Lane, Oklahoma, and his team were working on a project using watermelons when they realized that watermelon juice could be used to make ethanol, which can be used as fuel for cars. It doesn’t matter how the watermelons look, because only the juice is used. Could watermelon juice be the fuel for a car you might drive one day?

Read more about this green (or is it red?) fuel on National Geographic News.

Put your own words into a photo of a woman eating watermelon on National Geographic Kids.

Photograph by Gareth Richards, My Shot