Chicago is nation's greenest city

September 18, 2009 9:51:27 AM PDT
Chicago has earned the new title of the greenest city in the country.According to the U.S. Green Building Council, Chicago has 88 certified green buildings.

Portland, Oregon is second with 73, and Seattle ranks third with 63 green buildings.

Green certification is awarded for energy-saving systems, water conservation and close access to public transportation.

The City of Chicago requires new public buildings to achieve green certification.