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Giant Tree-Powered Machine Supplies Energy, Air to Madrid

This industrial environmentalist building/machine in Madrid is packed with solar cells and trees, and will apparently generate enough energy to sell to local electric companies. Called an "Air Tree," and created by Urban Ecosystems, the mega-device is supposed to have a significantly beneficial impact on the climate.… » 1/24/08 3:30pm 1/24/08 3:30pm