Emissions Inventory

Emissions Inventory Results From 2023

UTA's greenhouse gas emissions show that our Scope 1 and Scope 2 emissions have slightly increased since FY22. The slight increase in emissions can be attributed to an increase in the amount of electricity that was bought in FY23. While they are higher this year, they are still lower compared to where they were five years ago. 


The graph below shows that UTA's GHG emissions per square foot, are slightly higher compared to FY22, but still lower than what they were in 2010. 


Emissions Inventory Results From 2022


Between FY 2017 and FY 2022, total greenhouse gas emissions at UTA decreased overall (see Fig. 1).

UTA's Greenhouse Gas Emissions Broken into Scopes 1 and 2 from FY 2017 to FY 2022

UTA’s campus underwent an expansion in size from 2010 to 2022. Despite this expansion, the greenhouse gas emissions per square foot have been cut by almost a third in this time (see Fig. 4), indicating the success of low emission practices on campus when construction increases are neutralized. When looking at total emissions, without accounting for the larger size of the campus, there is a net decrease from 2010 to 2022 (see Fig. 5). While there was a net increase in total emissions between 2010 and 2019, starting in 2020 emissions dipped below 2010 emissions.

UTA's Greenhouse Gas Emissions per square foot from 2010 to 2022 and UTA's Total Greenhouse Has Emissions from 2010 to 2022


UTA's Greenhouse Gas Emissions Compared to peer institutions, using the performance year as reported in AASHE STARS

Figure 6


The 2019 inventory was conducted using SIMAP (Sustainability Indicator Management and Analysis Platform), offered by the Sustainability Institute at the University of New Hampshire. SIMAP guides universities in estimating emissions in 3 major areas: direct campus emissions (e.g. due to stationary fuel), indirect campus emissions (due to purchased electricity), and indirect transportation emissions (due primarily to commuting). SIMAP’s emissions factors are taken from US Environmental Protection Agency and other documented sources. Input data for SIMAP was collected from various sources like UTA’s Office of Sustainability, Data Analytics team, Office of Facilities Management, food outlet managers, and students, faculty, and staff.

The major contributors to UTA’s greenhouse gas emissions are shown in Fig. 1. Slightly over half of the emissions (51%) were due to electricity consumption, with indirect transportation emissions (commuting and international travel) contributing the second largest share. UTA’s emissions were 2.0 metric tons of carbon dioxide equivalents (CO2-eq.) per full-time equivalent (FTE) student. UTA emissions decreased from 2017 to 2019, despite increased student enrollment and a 7% increase in building area. Although UTA consumption of electricity increased during this period, emissions from electricity decreased, due to reduced coal generation and increased wind power. In addition, emissions from commuting decreased, due to a 9% increase in on-line enrollment, coupled with a 6% decrease in on-campus enrollment.

Bar graph comparing 2010-2019 emissions per square foot.

Emissions Source (Metric tons CO2e) 2005 2010 2016 2017 2018 2019
Total Scope 1 Emissions 25522 21092 21079 18059 18706 760
Vehicle Fuel Use 4628 1953 787 844 238.05 646
Natural Gas Combustion 17038 17922 20175 16543 18706 20988
Total Location Based Scope 2 Emissions 58455 54856 60032 54386 51133 51800
Electricity Usage 58455 54856
Total Emissions 83978 75948
73289 70838 73666



Several options were explored for reducing emissions from electricity consumption, the major contributor to greenhouse emissions at UTA. It was found that implementation of solar panels on 14 major UTA buildings would reduce emissions due to purchased electricity by 6.3%. The initial investment would pay for itself in savings in 1.7 years. It was found that about 23.9% of UTA’s campus is covered with trees, which absorb 467 tons of carbon dioxide emissions annually. Traditional air pollutants are also removed, providing an estimated $10,000 in benefits. UTA’s trees also provide benefits of almost $9000 per year in terms of avoided stormwater runoff. Planting the 20.7% of UTA’s land currently covered by soil or grass would approximately double the tree benefits at UTA in terms


In 2012, UT Arlington adopted a series of environmental performance targets as part of the development of a broader Campus Master Plan. Using the 2010 GHG analysis, we developed environmental performance goals in five goal areas: energy, buildings, transportation, waste, and water. Each goal was established with a 2005 base year and a target year of 2020.

By 2020, UT Arlington has committed to reduce:

  • Energy consumption by 20%
  • Fleet fuel consumption by 20%
  • Municipal waste by 20%
  • Municipal water use by 20%

In 2016, UTA conducted a Scope 1 and 2 GHG inventory consistent with The GHG Protocol, Corporate Accounting and Reporting Standard. This standard represents the best practice in GHG accounting for corporations, government entities, and universities. The Scope 1 emissions data collected included the quantity of natural gas used in university’s 109 buildings, the quantity of fuel used in university vehicles, and refrigerant purchased by the university, and Scope 2 was from purchased electricity.

Emissions Source 2005 2010 2016
Total Scope 1 Emissions 25522.3 21092.2 21079.5
Vehicle Fuel Use 4628.6 1953.1 787.6
Natural Gas Combustion 17038.2 17922.5 20175.3
HCFC-22 3855.5 1216.6 116.6
Total Location Based Scope 2 Emissions 58455.7 54856.7 60032.2
Electricity Usage 58455.7 54856.7
Total Emissions 93978 75948.9


In fiscal year 2016, total Scope 1 and 2 emissions for UT Arlington were 81,111.3 metric tons CO2e as shown in the table. This represents a 6.9% increase in emissions compared with 2010 and a 3.5% decrease in total Scope 1 and 2 emissions compared with 2005. The main drivers in the emissions increase was a 12.5% increase in natural gas consumption and an approximately 15% increase in electricity consumption on the campus. The increase in GHG emissions associated with the increased electricity usage was lessoned due to changes in electricity emissions factors used in the analysis to reflect an overall cleaner electric grid. At the same time, UT Arlington reduced emissions from both refrigerant usage and its vehicle fleet between 2010 and 2016, as HCFC – 22 emissions decreased by 90% and vehicle fleet emissions decreased by roughly 60%.

 Bar chart showing scope 1 and 2 GHG emissions at UT Arlington for years 2010 and 2016.

Scope 1 and 2 emissions increased by approximately 7% between 2010 and 2016 despite an approximately 20% increase in the square footage of buildings on campus during the same time period (Figure 2). As the vast majority of UT Arlington’s emissions are produced by electricity and natural gas consumed in building, square footage is likely the major driver of emissions at the university. Given the large increase in building square footage between 2010 and 2016, facility emissions from natural gas and electricity per building square foot decreased by 12% between 2010 and 2016, as shown in Figure 1.