Massive Solar Electricity Plant Provides Power To California Homes

PRIMM, NV - JULY 23: The three towers at the Ivanpah Solar Electric Generating System are shown in operation on July 23, 2014 in the Mojave Desert in California near Primm, Nevada. The largest solar thermal power-tower system in the world, owned by NRG Energy, Google and BrightSource Energy, opened earlier this year in the Ivanpah Dry Lake and uses 347,000 computer-controlled mirrors to focus sunlight onto boilers on top of three 459-foot towers, where water is heated to produce steam to power turbines providing power to more than 140,000 California homes. (Photo by Ethan Miller/Getty Images)