Renewable energy : Energy generated by using wind, tides, solar, geothermal heat, and biomass including farm and animal waste as well as human excreta is known as nonconventional energy. All these sources are renewable or in exhaustible and do not cause environmental pollution. More over they do not require heavy expenditure.
The example of Renewable energy sources 1. Wind power 2. Biomass 3. Solar applications of energy 4. Hydraulic power 5. Fuel cells 6. Bio fuels