Which city pollutes most? (Hint: It's not New York or L.A.)

Lexington, Ky., which touts itself as the Horse Capital of the World, now has a less appealing nickname:


A first-of-its-kind study of the carbon footprints of the nation's 100 largest metropolitan areas being released by the Brookings Institution on Thursday puts Lexington at No. 100 -- the worst of them all.

Lexington is the 91st-largest metro area, but spews the greenhouse gases that contribute to global climate change at a per capita rate much higher than large cities such as Los Angeles (No. 2 on the footprint list) and New York (No. 4).

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