05/24/2010 05:12 am ET | Updated May 25, 2011

Chicago's Green Buildings Saved City $50 Million, Says EPA Report

When it comes to saving energy, Chicago buildings top a national list.

That's according to the second annual ranking of cities by the U.S. Environmental Protection Agency. Out of the 25 cities the EPA rated, Chicago came in 5th for having the most number of energy efficient buildings in the country - that's a step up from it's number six spot on the list last year.

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