Answer: hydroelectric
Sun Oct 10 2004 14:30:00 GMT-0400 (Eastern Daylight Time) ยท Sustainable energy is energy produced and used in such a way that it “meets the needs of the present without compromising the ability of future generations to meet their own needs.” It is similar to the concepts of green energy and clean energy in its consideration of environmental impacts however formal definitions of sustainable energy also include economic and social impacts.
Energy in the United States comes mostly from fossil fuels: in 2010 data showed that 25% of the nation’s energy originates from petroleum 22% from coal and 22% from natural gas. Nuclear power supplied 8.4% and renewable energy supplied 8% mainly from hydroelectric dams and biomass; however this also includes other renewable sources like wind geothermal and solar.
The levelized cost of energy (LCOE) is a measure of a power source that allows comparison of different methods of electricity generation on a consistent basis. The LCOE can also be regarded as the minimum constant price at which electricity must be sold in order to break even over the lifetime of the project. This can be roughly calculated as the net present value of all costs over the …
Energy storage is the capture of energy produced at one time for use at a later time to reduce imbalances between energy demand and energy production. A device that stores energy is generally called an accumulator or battery.Energy comes in multiple forms including radiation chemical gravitational potential electrical potential electricity elevated temperature latent heat and kinetic.
In energy economics and ecological ener…