Let the sunshine!

Monday - 8/3/2009, 12:39pm EDT

The U.S. Army has picked two firms -- Clark Energy Group of Bethesda, and Acciona Solar Power of Henderson, Nevada -- to help develop and build the largest solar power array in the Department of Defense. It will be built at Fort Irwin, in California's Mojave Desert. When complete, the solar farm will generate 500 megawatts using photovoltaic cells, and solar concentrators, which turns the heat of the sun into electricity.