The Brookings Institution is unto something quite spectacular if Los Angeles indeed deserves to be hailed as the greenest city in America (“And the Winner Is…,” May 31, 2008). Sincere congratulations! Not to the epitome of urban sprawl, mind you, but to the intrepid number-crunchers at Brookings. Their methodology for calculating the carbon footprint of cities, about which you have absolutely nothing to say, is certainly slated for much greater feats in the future. It can surely be extended to entire countries. Sooner or later, America is bound to end up as the greenest country in the world. After all, it is the land of urban sprawl in all its guises. Once again, and well ahead of the Brookings’ forthcoming report and your fawning article about green countries, sincere congratulations!