President Clinton’s Climate Initiative has announced efforts to green the existing building stock. As part of the Energy Efficiency Building Retrofit Program, 16 of the world’s largest cities have agreed to participate in the retrofit program, and offer their municipal buildings for the first round of energy retrofits: Bangkok, Berlin, Chicago, Houston, Johannesburg, Karachi, London, Melbourne, Mexico City, Mumbai, New York, Rome, Sao Paulo, Seoul, Tokyo, and Toronto. Bet there are plenty of important historic places among them.

Meanwhile, the U.S. Green Building Council has renewed their efforts to address existing buildings in an improved version of LEED-EB.