According to a study by the American Institute of Architects (AIA), the number of cities boasting green building initiatives surged by 418 percent, from 22 cities to 92 cities between 2003 and 2007.

The study found green building is encouraged in a variety of ways, such as income tax credits and programs that accelerate the permitting process. In terms of certification, Atlanta possessed the most LEED facilities per capita in the United States in 2006; Chicago contains more LEED registered projects than any other city, and Scottsdale, Ariz., was the first city to require LEED Gold for community buildings.

The AIA report also includes suggestions for cities seeking to adopt green building programs. To help drive the implementation of such programs nationwide, AIA is working with the National Association of Counties and the U.S. Conference of Mayors, and it also has created a tool kit to help interested cities.

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