Renewable Energy Technology
Regenerative energies, also called renewable energies is generally defined as energy that comes from resources which are naturally replenished on a human timescale. Physically, energy is neither consumed nor renewed, but it can be supplied to or removed from systems. The term "renewable energy" is now commonly used to describe systems that are able to extract energy from the environment and deliver it for technical utilization.
On earth, these energy sources are wind, sunlight, heat, wave power, geothermal heat and biomass.