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 pdf format of    1990 Baseline & 2020 Projected Statewide GHG Levels

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 xls format of    Massachusetts Annual Greenhouse Gas Emissions 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 pdf format of    MA GHG Emissions, BAU Projection

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2010 MA & US GHG by Sector

  

In Massachusetts, the transportation sector emits more greenhouse gas (GHG) than other sectors. Nationwide, both transportation and industrial sectors emit more GHG than other sectors.  Text version of the above graph pdf format of    2010 MA & US GHG Emissions by Sector
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2011 MA & US CO2 by Fuel Combusted

  

The combustion of petroleum emits more CO2 in Massachusetts and the U.S. than the combustion of other fossil fuels.  Massachusetts has significantly less CO2 emissions from coal burning than nationwide. Text version of the above graph pdf format of    2011 MA & US CO2 Emissions by Fuel Combusted
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MA CO2 by Fuel Combusted

  

Total CO2 emissions in Massachusetts are decreasing, because natural gas is increasingly replacing coal and petroleum as a cleaner fuel source.  [Energy efficiency and other policy measures, as well as economic trends, also influence emission levels] Text version of the above graph pdf format of    MA CO2 Emissions by Fuel Combusted
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MA Petroleum CO2 by Sector

  

The electric power sector has seen significant reductions in CO2 emissions from the combustion of petroleum. Text version of the above graph pdf format of    Largest GHG Sources in Massachusetts
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MA Coal CO2 by Sector

  

Since 2008, the electric power sector has also seen significant reductions in CO2 emissions from coal burning. Text version of the above graph pdf format of    MA Coal CO2 Emissions by Sector
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MA Natural Gas CO2 by Sector

  

CO2 emissions from natural gas combustion have increased in the commercial and residential sectors, and especially in the electric power sector. Text version of the above graph pdf format of    MA Natural Gas CO2 Emissions by Sector
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2010 MA GHG by Sector

  

Transportation and electricity consumption/generation emit more than 50% of the GHG emissions in Massachusetts. Text version of the above graph pdf format of    2010 MA GHG Emissions by Sector
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MA Electricity GHG by Sector

  

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 pdf format of    MA Electricity GHG Emissions by Sector
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