The phrase "heat engine" might trigger some bad memories from your introductory thermodynamics course. But don't worry, I am going to show you the coolest heat engine you could possibly image—the ...

If you can turn a wrench and operate an electric drill, you can build this simple generator in two days. Turn a car alternator into a homemade wind turbine by building this cheap and easy DIY wind ...

Mike De Socio is a CNET contributor who writes about energy, personal finance, electric vehicles and climate change. He's also the author of the nonfiction book, "Morally Straight: How the Fight for ...

A 200-gallon biogas generator in Oregon turns 15 pounds of food waste into cooking fuel daily. As food and yard waste decompose, methane and carbon dioxide are created, inflating the rubber bladder to ...

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Doug Mahoney Doug Mahoney is a writer covering home-improvement topics, ...