Here is an exert from an article about the Empire State Building going green.

http://www.newsmax.com/us/empire_sta...

"nearly 75 percent of the 4.64 million buildings in the United States are over 20 years old, according to U.S. Department of Energy, and were not built to conserve energy.

Commercial buildings are responsible for 79 percent of all carbon emissions in New York City."

AAT would go a long way to reducing that enormous figure!!

Babs