The sustainable form of energy is energy which can be used over long period of time without any harmful effects on the human and environment and can be easily harnessed again and again without depletion. It is also known as the Renewable form of energy like solar energy, wind energy, hydropower and so on. According to the Energy Information Administration, in 2007, renewable sources of energy accounted for about 7% of total energy consumption and 9.4% of total electricity generation in the United States. Sustainable energy technologies could increase the global energy security, improve the environmental quality and promote the energy economy. These technologies help us out to produce electricity, transportation without any environmental impacts.