Regional Greenhouse Gas Initiative
![The ten RGGI member states are shown in dark green. Observers are represented in lime green (New Jersey, shown in dark green, was a member until it withdrew effective at the beginning of 2012.](/Images/godic/202502/07/Rggi_map.svg5509.png")
Regional Greenhouse Gas Initiative (RGGI, or ReGGIe) is a regional initiative by states and provinces in the Northeastern United States and Eastern Canada regions to reduce greenhouse gas emissions. The RGGI is designing a cap and trade program for greenhouse gas emissions from power plants. RGGI is a cooperative effort among nine Northeastern and Mid-Atlantic States to reduce carbon dioxide emissions from the electric power sector through coordinated state cap and trade programs. Nine states currently participate in the initiative: Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New York, Rhode Island, and Vermont. Several states and Canadian provinces act as observers: Pennsylvania, Québec, New Brunswick, and Ontario. New Jersey formerly participated, but Gov. Chris Christie removed the state from RGGI in 2011.