Bozeman GHG Emission Report

- 10 -Figure 3. Bozeman’s 2020 stationary energy use sector greenhouse gas emissions.

TransportationThe transportation sector accounted for 32 percent of Bozeman’s total GHGemissions (177,593 mt CO2e).Figure 4 provides a breakdown of the contributingsources to emissions from the transportation sector.Emissions from gasoline vehicles (including emissionsfrom ethanol) made up 53% of transportation emissions(95,008 mt CO2e) and diesel vehicles made up 24%(41,932 mt CO2e). Aviation emissions made up 23% oftransportation emissions (39,999 mt CO2e). * Together,transit vehicles, electric vehicles, and T&D losses fromelectric vehicle charging made up under one percentof total transportation emissions. See Table 2 for moredetail. Between 2018 and 2020, transportationemissions decreased by 23%. These reductions canbe attributed to COVID-19 impacts and restrictions thatlimited travel within Bozeman and across the country.This trend mirrors the National trend in transportationemissions between 2018 and 2020, see Figure 13. Thehigh emissions stemming from gas and diesel vehicles(77%) mirrors national trends, the data conveys anopportunity for more sustainable travel.* Per the GPC protocol, transboundary aviation is defined as “The transportation emissions from large regional transit hubs (e.g., airports or seaports) servingthe city, but outside of the geographic boundary, should be counted in scope 3. These emissions are driven by activities within the city and should be included toprovide a more holistic view of the city’s transportation sector.”- 11 -