The Regional Greenhouse Gas Initiative (RGGI) is the first mandatory greenhouse gas (GHG) emissions cap-and-trade system in North America. The program has been in place since 2009 and regulates fossil fuel-powered electric generating plants in nine Northeast and mid-Atlantic states.1 The RGGI region had a combined Gross Domestic Product (GDP) of approximately $2.6 trillion in 2012—four times that of Ontario and almost 50% more than the entire Canadian economy in the same year