States with the strongest projection for water-cooled concentrated solar power plants and capacity (more than 15 sites each) are California, Idaho, Montana, and Wyoming.

FORBES: Plotting The Next-Generation U.S. Power Grid

BrightSource generates electricity using an approach called concentrated solar power, in which computer-controlled mirrors, known as heliostats, focus the sun's heat to boil water and turn a steam turbine.

ECONOMIST: Energy storage

If, on the one hand, you've got biofuels which represent only a half a percent conversion of sunlight, and let's say you've got photovoltaic cells and concentrated solar power systems, the efficiency of solar in terms of pure conversion is 50-100 times greater.

CNN: Biofuels: What do the experts think?

It builds biomass power plants, huge wind turbines for offshore wind farms and, as of today, concentrated solar thermal power plants.

FORBES: Areva Taps The Other Nuclear Source: The Sun