Clean energy and other parts of the 'clean economy' account for 2 percent of US jobs, employing some 2.7 million Americans, according to a recent report.
The Great Recession officially ended in June 2009. That's apparent on Wall Street, less so on Main Street. But the economic recovery is gradually being felt in places like Poughkeepsie, N.Y.
From Seattle to Huntsville, Ala., five cities are poised to prosper in the New Economy because of exports, innovation, clean technology, and healthcare.
Pittsburgh will show a green, high-tech face to its G-20 guests.
A report by the Brookings Institution looks at the 100 largest metro areas in the US, using data on residential energy consumption and highway transportation.