Photo of the Day

Picture of a bus shelter growing plants on its roof

Tiny Green Roof

This photo of a San Francisco bus shelter appeared in a May 2009 story about green roofs. When utilized on a large scale, green roofs can mitigate storm water runoff, lessen the urban heat island effect, and, of course, provide a pretty change of scenery in the city.
Photograph by Diane Cook and Len Jenshel, Nat Geo Image Collection