New sources of energy are constantly being discovered. And some are pretty inventive.
From soccer balls to pigs to human body heat, here are some of the strangest alternative energy sources we've recently come across.
A soccer ball
Soccket Inc. created a soccer ball that contains an inductive coil that captures energy when the ball is hit. Fifteen minutes of play provides 3 hours of LED light.
Source: Soccket
Animals' behinds
Farmers are converting the methane from their herds' waste and converting it to energy.
Source: Business Insider
Inmates
A prison in suburban Sao Paolo, Brazil, is having convicts pedal bikes to power some of the town's street lamps.
Source: TimesLeader.com
See the rest of the story at Business Insider