Pittsburgh: Cleaning and greening its image

Pittsburgh is trying to shed its image of a gritty, grimy steel town one building at a time. Its convention center is one of the most environmentally friendly buildings of its size in the entire country. CNET News.com's Kara Tsuboi visits Steel City and takes a tour of the space that boasts an organic garden, its own water reclamation plant, and a smart cooling system. The building was awarded gold-level certification on the Leadership in Energy and Environmental Design ratings scale set up by the U.S. Green Building Council.