World's first powerful solar generator

PSFK, a trend-watching blog, recently pointed out a new project underway in Australia called the Solar Tower, which aims to use only solar and wind power to generate the same kinds of mass electricity as something like only a nuclear generator could do before. (It's expected to generate 200 megawatts, enough electricity to power 200,000 homes, even while sparing the planet the 830,000 tons of greenhouse gases most power plants generate in the process.) The details are all in that original post, but here's I think one of the more interesting tidbits - if built, at 3,280 feet (or one kilometer) the Solar Tower would be twice the height of the current tallest manmade structure on Earth (Canada's CN Tower). And all this without producing one solitary harmful side-effect. Impressive!