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2020 Update


Greenhouse Gas Inventory

Stony Brook University maintains on an annual basis a comprehensive report on utility cost and consumption. Much of the data used in the 2019 Greenhouse Gas Emissions Inventory was gathered from this source. We also relied on information provided by the staff at the cogeneration facility that services the university. Our Department of Transportation and Parking Operations provided us with the fuel information from the University fleet. 

Reporting Year Scope 1 Scope 2 Total Emissions % Reduction
1990 (Baseline Year) 114,007  MTCO2e 123,311  MTCO2e 237,318  MTCO2e --
2010 148,254  MTCO2e 23,501  MTCO2e 171,755  MTCO2e 27.63%
2012 148,526  MTCO2e 19,409  MTCO2e 167,935  MTCO2e 29.24%
2014 142,888  MTCO2e 17,220  MTCO2e 160,108  MTCO2e 32.53%
2015 133,638  MTCO2e 17,393  MTCO2e 151,031  MTCO2e 36.36%
2016 136,374  MTCO2e 17,494  MTCO2e 153,868  MTCO2e 35.16%
2017 137,712  MTCO2e 14,089  MTCO2e 151,801  MTCO2e 36.03%
2018 143,040  MTCO2e 14,122  MTCO2e 157,162  MTCO2e 33.78%
2019 132,848  MTCO2e 17,110 MTCO2e 149,958 MTCO2e 36.81%
Changes to Operational Boundaries

As part of SBU's commitment to tracking GHG emissions from the past decade, a change was made to the university's baseline data. In addition to the completed inventories that cover 2014 to 2019, SBU has changed its baseline year to 1990 in order to track progress towards state energy requirements. As a state entity, SBU is required to reduce GHG emissions by 40% by 2030 and 80% by 2050 under NYS Executive Order 166.

The decision to use 1990 as SBU's baseline year will provide a clear picture of how effective university conservation measures have been on total university emissions. In order to remain consistent regarding future inventories, SBU will continue to include these boundaries in our emission reduction strategies.

Baseline Results

The total emissions found in the new baseline year of 1990 were 237,318 MTCO 2e. This figure was fairly equally distributed between Scope 1 and Scope 2, with 52% of emissions being indirect (Scope 2). The majority of these indirect emissions were from consuming purchased energy. Emissions sources from 1990 are displayed in Figure 1 below.


GHG Emissions 2010-2019

Starting in 2019, SBU has committed to preparing an annual GHG Emissions Inventory for the university using the SIMAP tool, created by The Sustainability Institute at the University of New Hampshire. In addition to completing the university’s 2019 report, SBU has also submitted emissions inventories for the past five years. These reports together with the existing inventories filed in 2010 and 2012 provide a clear look at the progress made in relation to the 1990 baseline.

With the completion of the 2019 inventory, SBU is reporting a 36.81% reduction in net emissions against the baseline year. These figures place SBU in good standing in their goal to accomplish a 40% reduction in net emissions by 2030, as per the New York State Energy Plan requirements. Net emission figures are represented below.


Scope 1

When comparing current day emissions to those from 1990, SBU has shown a slight increase of 16.53% in Scope 1 emissions. Much of this increase is the direct result of the 45 megawatt cogeneration facility operating on SBU campus since 1995. Since 2010, increased efficiency in the cogeneration plant has led to a 10.53% decrease in Scope 1 emissions at SBU. Net Scope 1 emissions are shown below.


Scope 2

The introduction of the cogeneration plant in 1995 also had a dramatic effect on the university’s Scope 2 emissions. As shown in figure 4 below, SBU’s Scope 2 emissions have decreased over 85% since 1990. Additionally, SBU has seen its Scope 2 emissions decrease over 27% since 2010, meaning the reduction perhaps goes deeper than just a change in source.


    For More Information on SBU Emissions

    Visit SBU's Second Nature profile for more information on the university's completed GHG Emissions Inventories and how conservation measures are changing our campus.

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