From the Daily Mail:
A gargantuan solar power tower is to be built in the Arizona desert, which, at double the height of the Empire State Building, will be the second tallest building in the world.
The tower, which will be built 130 miles west of Phoenix in La Paz County, is planned as a revolutionary electricity source deep in the desert.
Turbines will be used to force air which is heated by the sun through a 2,600 foot chimney in order to generate huge amounts of natural power.
It is estimated that more than one million megawatt hours will be produced by the huge building, providing enough electricity to power 150,000 homes.
The project is being planned by a company called EnviroMission. Its president, Chris Davey, told azfamily.com: 'It doesn't use water; it does it reliably; it does it cost competitively. I don't think the industry could ask for more than that.'