Regional Greenhouse Gas Emissions Inventory -1990 - 2010 (PAG, 2012)
Eastern Pima County - 1990 to 2010
This inventory includes community emissions from Tucson and the other surrounding towns, tribal areas and unincorporated areas of eastern Pima County. From 1990 to 2010, the County regional GHG emissions increased by 41 percent, which closely followed the corresponding 47 percent population growth. However, from 2008 to 2010, the County regional emissions dropped by 3 percent. In 2010, the County generated 14.3 million metric tons of carbon dioxide equivalents (CO2e). The majority of these emissions are from electricity use and transportation; 99 percent of the transportation emissions can be attributed to personal and commercial vehicle travel.
Eastern Pima County Population and Greenhouse Gas Emission Trends - 1990-2010
Eastern Pima County’s Regional 2010 GHG Emissions by Sector
Other: Compressed natural gas (CNG) and biodiesel
City of Tucson 1990-2010
This inventory includes GHG emissions generated only within the city limits of Tucson. From 1990 to 2010, Tucson community GHG emissions increased by 29 percent, which closely follows the 27 percent population growth over this same period. From 2008 to 2010, Tucson community emissions declined slightly (1 percent). In 2010, Tucson produced 7 million metric tons of CO2e, slightly less than half of the County’s total. As in the County, Tucson’s major sources of GHG emissions were from electricity use and vehicle travel.
Marana Greenhouse Gas Emissions Inventory - 2007 and 2008 (PAG, 2010)
In the Town of Marana, community GHG emissions rose by 9 percent from 2007 to 2008, with a concurrent 5 percent rise in population (2010 Census). For comparison, eastern Pima County’s GHG emissions dropped by 4 percent with less than 1 percent rise in population (2010 Census) over this same period. Transportation emissions contributed 63 percent to Marana’s 2008 total, primarily due to the amount of Interstate 10 travel that occurred within its boundaries. Energy use (electric and natural gas) by all sectors was responsible for approximately 37 percent of the total 2008 GHG emissions.
2008 Marana Community GHG Emissions
Oro Valley GHG Inventory - 2000 and 2008 (PAG, 2010)
From 2000 to 2008, the Town of Oro Valley community GHG emissions grew by an estimated 39 percent, tracking the 28 percent growth in population (2010 Census). Over this same 8-year span, eastern Pima County’s emissions grew by 15 percent with a corresponding 17 percent rise in population. Energy use (electric and natural gas) by all sectors was responsible for 64 percent of Oro Valley’s GHG 2008 emissions, with transportation contributing an estimated 33 percent.
2008 Oro Valley Community GHG Emissions
Sahuarita GHG Inventory - 2006-2008 (PAG, 2010)
Over this two-year period, Sahuarita’s GHG community emissions grew by 30 percent, coinciding with a 28 percent growth in population (2010 Census). For comparison, Eastern Pima County’s GHG emissions and population both grew by 3 percent from 2006 to 2008. Energy use (electric and natural gas) by all sectors contributed 51 percent, with vehicle travel producing 47 percent of the town’s 2008 total.
2008 Sahuarita Community GHG Emissions