Throughout the Western power grid (WECC footprint) there are resources that emit greenhouse gases as a byproduct of producing electricity. From the buildouts and subsequent price forecasts in AURORA there is an associated CO2e emissions power sector forecast for each of the tested policy landscapes.
Annual WECC-wide Emissions
The data supporting the above graph of the WECC-wide emissions forecast is linked here.
 WECC stands for Western Electric Coordinating Council which is the not for profit corporation that exists to ensure a reliable bulk power system throughout the Western Interconnection, which includes the following: British Columbia, Alberta, Washington, Oregon, Idaho, Wyoming, California, Nevada, Utah, Arizona; most of New Mexico, Montana, Colorado; and some of the Dakotas, Nevbraska and North Baja California.
 AURORA is a commercial production cost model licensed from Energy Exemplar
 CO2e refers to carbon dioxide equivalent emissions