5 Feasible Renewable Energy Sources
(PhysOrg.com) -- President Barack Obama has made no secret of his desire to develop a "green economy" that includes renewable energy projects meant to benefit the environment. He has said that part of the economic recovery in the U.S. will come from money for, and jobs created by, renewable energy projects. Around the world, politicians, businesses and scientists are developing the technology that could improve the cost-efficiency of renewable energy. One would expect that -- over time -- the costs associated with renewable energy would go down. With fossil fuels, costs can only go up as the un-renewable sources dwindle and become more scarce even as demand rises. Here are 5 feasible renewable energy sources that could be developed to help meet world energy needs: