Could this new $30 million green tower be the future of world cities?

SEATTLE – An office building that lasts 250 years with no monthly electricity or water bills? It may sound like an environmentalist’s pipe dream, but it will soon be a reality, say the builders of what they hope will be the biggest office tower in the nation that produces as much water and electricity as it consumes. Currently rising from a pit in downtown Seattle, the $30 million, six-story “living building” is being spearheaded by Denis Hayes and Jason McLennan, who believe they can save the world one building at a time by reducing the massive energy appetites of modern cities.