GreenVolts, a San Francisco startup, is building arrays of microdishes - dinner-plate-sized mirrors that concentrate the sun on an efficient solar cell. Small clusters of these microdishes are compact enough to be installed near cities, plugging directly into the grid to relieve overloaded substations.
|  The economics -- and the technology -- of turning light into electricity have changed. We have the inside look at the industrial-strength power plants coming soon to a grid near you. (more)  Meet the companies tackling nine of humanity's biggest problems -- and making millions saving us from ourselves. (more) |
