The Best Ways to Use Renewable Energy

Geothermal II (13/13)

Not every country can rely on geothermal plants as a viable energy source. Engineers in Australia are trying to push the boundaries of geothermal energy usage by developing a new system to generate electricity from the heat of ancient rocks buried up to three kilometers below the Australian outback. Spurred by high commodity prices and a drive to reduce Australia's reliance on coal, several companies are looking to harness hot rock temperatures of up to 300 degrees Celsius (570 degrees Fahrenheit) to produce clean energy. (Graphic: Reuters)