Cow dung releases huge amounts of methane gas when it sits around, but few farms do anything to put that waste to use, other than using it as fertilizer. Now a huge plant is being built in China, that will use the waste from 60,000 cows to provide electricity to thousands of homes.

Piezoelectric generators take motion and turn it into electricity. They've been used to convert muscle movement into energy to run medical implants, but it's been hard to get them to scale up enough to power stuff that's bigger and more fun. Researchers at Georgia Tech have been able to create a tiny piezoelectric nanogenerator that's capable of powering an LED and a liquid crystal display, and your iPod is going to be next.

A new type of fuel cell points to a future where gadgets could be powered by the same fuel as 10 year old kids - sugar!

Knowledge is power, or so they say. So if you're trying to take control over your energy usage, you've gotta know just how and where you're using it. That's the idea behind the new Belkin Conserve Insight, a little gadget that you plug any device into in order to really track what it's costing.