The Best Ways to Use Renewable Energy

Solar Thermal Power (1/13)

View of a solar park under construction near Seville, Spain in May 2007. Large mirrors are used to concentrate the sun's rays onto the top of a 100-meter tower where it produces steam to drive a turbine. This project is part of a larger EU-financed Sanlucar la Mayor Solar Platform that, when completed in 2013, will produce enough energy to power 180,000 homes.

According to the UNEP, solar power received 16 percent of the overall 70.9 billion US dollars invested in renewable energy worldwide in 2006. (Photo: Reuters)