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.

Solar trough
In California's Mojave Desert, parabolic mirrors heat tubes of synthetic oil, which in turn produce steam to drive electricity-generating turbines in an arrangement that's known as a solar trough. Built by Luz in the 1980s, the solar plants continue to power 150,000 homes. Now solar-trough technology is drawing interest again. Acciona Solar Power has built a 64-megawatt plant in Nevada.






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