The Clinton Climate Initiative, New York, and U.S. Green Building Council, Washington, D.C., have expanded their part- nership to reduce carbon dioxide and other greenhouse-gas emissions from the built environment on a global scale. The initial focus is on driving efficiency in existing buildings. In the U.S. alone, improving less-efficient buildings could save the economy more than $160 billion by 2030, according to McKinsey & Co., Washington. “Retrofitting buildings represents an immediate and measurable opportunity to cut greenhouse- gas emissions and improve our economy,” says former President Bill Clinton. “They are a priority for my Climate Initiative, which is encouraging retrofit projects around the world.” To date, the Clinton Climate Initiative’s Energy Efficiency Building Retrofit Program has helped partners to initiate more than 250 retro- fit projects encompassing more than 500 million square feet (46 million m2) of real estate in more than 30 cities around the world. For more information about the Clinton Climate Initia- tive, visit