A huge 1-kilometer-high thermal power station is planned to be built in Australia called the Solar Tower. Planned for several years now, the 3,280-foot Solar Tower is one of the...

A huge 1-kilometer-high thermal power station is planned to be built in Australia called the Solar Tower. Planned for several years now, the 3,280-foot Solar Tower is one of the most ambitious alternative energy projects on the planet: a renewable energy plant that pumps out the same power as a small reactor but is totally safe. If built, it will be nearly double the height of the world’s tallest structure, the CN Tower in Canada.

The Solar Tower is hollow in the middle like a chimney. At its base is a solar collector — a 25,000-acre, transparent circular skirt. The air under the collector is heated by the sun and funneled up the chimney by convection — hot air rises. As it rises, the air accelerates to 35 mph, driving 32 wind turbines inside the tower, which generate electricity much like conventional wind farms.

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