 |
HydropowerHydropower has been used for millennia in most countries of the world. Its longest application has been for use in mechanical tasks, such as grinding grain. With such simple mechanical devices as a "noria", it has also long been used to lift water. Within the last 100 years... |
|
|
|
 |
Geothermal EnergyGeothermal energy is, literally, the heat of the earth. The heat itself derives from radioactive decay beneath the earth's surface and, in certain locations, it is concentrated enough and is close enough to surface waters to be brought to the surface for a variety of purposes. When it is above... |
|
|
|
 |
Wind PowerLike hydropower, wind power has been used for centuries, to lift water, propel boats, grind grain. It is an attractive and non-polluting source for electricity. It has only been since the mid 1980s, however, that wind power has contributed appreciably... |
|
|
|
 |
BioenergyThis section in progress... In the interim, visit this site for information: www1.eere.energy.gov/biomass/ |
|
|
|
 |
HydrogenThis section in progress... In the interim, visit this site for information: www1.eere.energy.gov/hydrogenandfuelcells/ |