Currently, the majority of the United States's renewable energy production comes from hydroelectric power, solar power and wind power. According to the
U.S. Department of Energy, the cost of wind power doubled between the years of 2002 to 2008. However, since then, the prices of wind power have declined by 33%. Various factors have contributed to the decline in the cost of wind power, such as government subsidies, tax breaks, technological advancement and the cost of oil and natural gas.
Hydroelectric power has been the main source of renewable energy because it has been reliable over time. Nonetheless, there are challenges in hydropower. For example, traditional hydroelectric power required damming rivers and other sources of water. Damming disrupts the environment in and near the water, proximally because the dam necessarily creates a lake at the water source. Other complications may include protest by environmentalists. However, new forms of hydroelectric power that harness wave energy from oceans have been in development in recent years. Although these power sources need further development to become economically viable, they have potential to become significant sources of energy. In recent years,
wind energy and
solar energy have made the largest steps towards significant energy production in the United States. These sources have little impact on the environment and have the highest potential of renewable energy sources used today. Advances in technology, government tax rebates, subsidies, grants, and economic need have all lead to huge steps towards the usage of sustainable wind and solar energy today. ==In the U.S.==