The U.S. Environmental Protection Agency (EPA) released the annual list of U.S. metropolitan areas with the most Energy Star certified buildings for 2011. This is an important ranking because energy use in commercial buildings accounts for nearly 20 per cent of U.S. greenhouse gas emissions at a cost of more than $100 billion per year.
In contrast, Energy Star certified buildings use an average of 35 percent less energy and are responsible for 35 per cent less carbon dioxide emissions than typical buildings.
By the end of 2011, the nearly 16,500 Energy Star certified buildings across America have helped save nearly $2.3 billion in annual utility bills and prevent greenhouse gas emissions equal to emissions from the annual energy use of more than 1.5 million homes.
"More and more organisations are discovering the value of Energy Star as they work to cut costs and reduce their energy use," said EPA Administrator Lisa P. Jackson.
2011's results: Los Angeles has remained the top city since 2008, while Washington, D.C. continues to hold onto second place for the third year in a row. Atlanta moved up from the number six spot in 2010 to third place this year and Boston and Riverside broke into the top ten. Tampa, Fla., Colorado Springs, Colo. and Salt Lake City all are new to the list in 2011. California has six cities on the 2011 list—more than any other state.