More than 5,200 U.S. homes have been LEED-certified this year, and a total of 21,380 since the residential program was introduced in 2008. In just over 14 years, the number of Energy Star-certified homes reached a million, from October 1995 to November 2009, and the program continues to grow, challenging builders to improve energy efficiency and reduce environmental impact.
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[1] http://www.nwitimes.com/lifestyles/columnists/michelle-krueger/moving-beyond-energy-efficiency-to-sustainability/article_f6e5a94e-4fae-517a-8ef7-ade97e77013a.html