In early 2007, the politics of climate change experienced a tectonic shift when the CEOs of ten major corporations and four national environmental groups – including WRI – joined together in calling on the U.S. government to quickly enact strong national legislation requiring significant reductions in greenhouse gas (GHG) emissions. The U.S. Climate Action Partnership (USCAP) and its bold proposals have advanced the policy debate in Congress. As USCAP membership grows (now at thirty one participating organizations representing over 2 million people in membership and over $2 trillion in market capitalization) so does the number of climate bills introduced. WRI was instrumental in the formation of USCAP, which is the result of a ten-year effort to engage the private sector in the design of business strategies and market-based policies to achieve strong national GHG reduction goals.