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6 Solar technologies to power the world

At last, solar energy is big enough and cheap enough to power electrical grids. Business 2.0 features the latest projects under the sun.

Microdishes
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.

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