2018 Greenhouse Gas Emissions Inventory
The 2018 Community-Scale GHG Emission Inventory, which is the third update, shows Phoenix-wide GHG emissions to be 16,603,754 metric tons of carbon dioxide equivalents (MT CO2e), a 0.5% reduction in the overall GHG emissions compared to the 2012 levels of 16,692,626 MT CO2e.
Emissions increased in the Transportation Sector by 12% which was proportional to population growth. Stationary Energy GHG emissions decreased 9%, driven by a less GHG-intensive regional electricity grid. Waste Sector GHG emission decreased by 17% between 2012 and 2018, but are small compared to the Stationary Energy and Transportation sectors. While Solid Waste GHG emissions will occur from the ongoing disposal of solid waste, closed landfills within the City produce less GHG emissions as the waste decays.
Distribution of GHG Emissions by Sector
The Transportation Sector is the second-largest source of GHG emissions in Phoenix and increased 12% between 2012 and 2018. On-road transportation, mainly gasoline consumption, drove the Transportation Sector GHG emissions increase. Measures to reduce transportation-related GHG emissions will reduce community-scale GHG emissions. Gasoline-powered motor vehicles used for on-road transportation is the largest single source of transportation-related GHG emissions. Increased adoption of battery electric vehicles or plugin electric hybrid vehicles is one avenue to reduce transportation-related GHG emissions. Another is higher adoption rate of mass transit options.