Real Estate Leadership in the Age of Climate Change, August 2009. “Buildings are responsible for 42% of U.S. greenhouse gas emissions, so real estate is a key sector through which to address climate change. In May 2009, the Garrison Institute held a three-day retreat for a group of thirty leaders of large and small companies in the real estate sector, leaders of not-for-profit community-based real estate organizations and rising young leaders, to discuss the real estate sector’s response to climate change.”