Dear Jim: We have teenage daughters who take long showers. Our water heating costs are sky high. We are on a tight budget, but want to use some solar water heating. Is there a do-it-yourself system we ...

Everyone wants to stay warm and cozy on a cold winter day. But keeping the heat pumping in your home can be frightfully expensive, a reason many seek out alternative sources of relief. There's no ...

There is no wrong way to build a first biogas digester, so long as it results in the unforgettable experience of seeing the miraculous blue flame of biogas for the first time. Soon afterwards, however ...