Leading by Example Progress: Greenhouse Gas Emissions

Leading by Example progress to reduce greenhouse gas (GHG) emissions at Massachusetts state facilities.

Table of Contents

Annual GHG Emissions

Annual GHG Emissions

Overall GHG emissions have decreased 28 percent from the LBE Baseline through FY17, reducing overall annual emissions by some 350,354 metric tons.

Annual GHG Emissions from Building Fuels

Annual GHG Emissions from Building Fuels

In FY17, compared to the LBE baseline, relative emissions contributions from building fuels have changed significantly. While emissions from electricity have decreased modestly, emissions from fuel oil and coal have been dramatically reduced or eliminated, while emissions from natural gas have more than doubled. These trends are consistent with fuel switching away from dirtier fuels, energy efficiency and installation of natural gas combined heat and power (CHP) and renewable energy.

Annual GHG Emissions over Change in Square Footage

Annual GHG Emissions over Change in Square Footage

Despite a 17 percent increase in square footage across state facilities, overall emissions have declined 28% and emissions per square foot have decreased 39 percent from the LBE baseline year through Fiscal Year 2017.

*LBE does not track square footage or EUI for 5 of the 49 state partners, due to the nature of energy and facility use at these sites.

GHG Emissions by Fuel

GHG Emissions by Fuel - comparing baseline to FY17


In the LBE Baseline (FY02-FY04 average),  grid electricity was by far the largest contributor to total GHG emissions, comprising 51% of total emissions, with fuel oil  and coal contributing 21% and 5% of emissions, respectively. Natural gas comprised 16% of the fuel portfolio, while vehicle fuels comprised 6% of total emissions. 


Fiscal Year 2017:

Natural gas contributions to GHG emissions climbed to 45% of total emissions, with the contribution from electricity falling slightly, to 41%. Emissions from fuel oil decreased significantly to just 4% of total emissions, while coal was eliminated from the state portfolio entirely. Emissions from vehicle fuels have remained relatively stable over time.