The benefits of using sustainable sources of energy are both real and significant in nature. Building a wind turbine produces only 9 percent of the carbon output that burning coal does, and hydroelectric power a mere 4 percent. In addition, burning wood for fuel is far less harmful than gasoline--even after factoring in transportation costs. First, they eliminate the need for fossil fuels, which are finite and contribute hugely to environmental damage. Second, they help to cut down on greenhouse gases that led to global warming. Thirdly, given the widespread distribution of these resources, sustainable-energy sources offer energy security and independent of place. Furthermore, due to their lower operational and maintenance costs overtime significant savings can be gained from clean energy products. Inves- tment in sustainable energy is also an engine of job creation and growth in the renewable energy sector. This, in return for potential customers means reduced energy bills, a cleaner environment, and a more robust power supply.