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Super-Insulated Walls Slash Energy Use in Green-Rebuilt Town

After a giant twister mangles the town of Greensburg, Kan., businesses and families like the Allisons rebuild green, starting with energy-saving insulated concrete form (ICF) walls. From the Greensburg TV series, part of the Planet Green collection of TV shows now on Gaiam DVD. Green building experts from the Greensburg project also shared tips on how to green the home you're in.