National Public Radio: One of the world's greenest office buildings formally open its doors Monday - Earth Day. It's a project of the environmentally progressive Bullitt Foundation. Its ambition is bold: to showcase an entirely self-sustaining office building hoping that others will create similar projects.
The first thing that strikes you about the new Bullitt Center is the windows. Walking up to the building in Seattle's Capitol Hill neighborhood, six stories of floor-to-ceiling glass soars above you.
And there's...