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UI Greenhouse Gas Inventory

The University of Iowa has a number of sources which emit greenhouse gases (GHG).  The majority of our greenhouse gas emissions are carbon dioxide (CO2) associated with burning fossil fuel in the Main Power Plant and purchasing electric power from the grid. CO2 emissions from biomass combustion are not counted in this inventory.

From 2003 through 2010, The University of Iowa was a member of the Chicago Climate Exchange (CCX).  CCX was a voluntary reduction and trading system designed to use financial markets to stimulate reduction in GHG emissions. As part of our CCX membership, we were required to have our GHG inventory audited by an independent firm selected by CCX.  We learned many lessons about how to track energy procurement and calculate GHG emissions associated with our energy use.  CCX closed in 2010.

The graph below shows our Scope 1 and Scope 2 carbon dioxide emissions from 2010 to 2020.  Data for 2010, 2011, and 2012 is actual, data from 2013 onward is forecast.  The forecast emissions are based on our current renewable energy strategy.  It also has a line showing the percent renewable energy used in our Main Power Plant and the University of Iowa Research Park Power Plant.

GHG Bar Chart


Emission factors used to calculate the CO2 emissions are:

Coal 2,240 kg/short ton 240 lb/MMBtu
Natural Gas 54.7 kg/1000 cubic ft 120.6 lb/MMBtu
Purchased Electric 1,820 lb/mWh 534 lb/MMBtu

(updated February 19, 2013)

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Sustainability at Iowa

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200 South Clinton St.
Iowa City, IA 52242
(319) 335-5516