Alternative energy describes various sources of energy that are renewable in nature and cause less pollution of the environment than traditional, nonsustainability fuels. Alternative energy's primary functions are as a source of electricity, heating and cooling for residences or forces in commerce; transportation power. Technological characteristics are first-class solar panels, fine wind turbines, pioneering biomass systems and state-of-the-art hydroelectric technologies. The aim of these technologies is to utilize natural energy from the sun, wind, water and biological materials. Applications extend from household and commercial power to large-scale industrial use as well as for electric autos. By increasing the number of choices available to us for energy, alternative energy offers a future of sustainablility and energy security.