Using the sun's light as a source of energy is not a new concept. Give your environmental studies, engineering, or physical science class this list of how humans have used solar energy throughout history. Assign groups a certain time...

Explains the types of solar water heaters a home can have. These include a passive system, an active system, and a solar collector, as well as the need for a storage tank. It also gives tips on how to get the best use from a solar water...