This graph shows that GHG emissions in Massachusetts decreased by 16 percent between 1990 and 2011, from approximately 94 MMT CO2e to 80 MMT CO2e. The graph also shows that the 2011 emissions level was significantly less than had been projected in the “Business as Usual (BAU)” scenario, which was developed to estimate what emissions in 2010 – 2020 would be without any new policy implementation. The 16 percent decline in emissions is a result of many factors including an economic downturn, changing fuel prices, and implementation of energy efficiency measures. More information on the 1990 Baseline and BAU Projection for GHG Emissions in Massachusetts can be found at http://www.mass.gov/eea/docs/dep/air/climate/1990-2020-final.pdf
The Department of Environmental Protection (MassDEP) estimates the GHG emissions in the Commonwealth using EPA’s State GHG Inventory Tool (SGIT), and publishes the Massachusetts Greenhouse Gas Inventory on a regular basis for emissions monitoring and analysis of emission trends. Using the most recent inventory data, the graphs on this page illustrate GHG emission trends in Massachusetts by sector and by fuel type. Text version of the above graph
Electricity consumption in the commercial sector previously emitted more GHG in Massachusetts than electricity consumption by other sectors. Since 2009, GHG emissions from electricity consumption are almost equally shared by the residential, commercial, and industrial sectors.
Text version of the above graph