by Flemming Funch
A 1,000m tall tower is planned as part of a huge 200MW solar power plant in the Australian outback. The air under a 4 mile diameter circle of glass would be heated by the sun, and the heat would rise up into the tower where turbines would convert it into electricity. It is planned to be completed in 2006, at a cost of A$1b and would be by far the tallest free-standing structure in the world.
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