Regional Greenhouse Gas Emissions Inventory -1990 - 2012 (PAG, 2014)
Eastern Pima County - 1990 to 2012
Overall, the County region’s greenhouse (GHG) emissions rose by 32 percent between1990 and 2012. Most of this increase can be attributed to the 48 percent growth in population and the associated increases in County regional total energy use emissions (43 percent), as well as a 30 percent increase in private and commercial vehicle travel emissions.
From 2010 to 2012, total County Regional emissions dropped 3 percent, reflecting declines in several sectors with the exception of those associated with waste disposal and commercial energy use.
In 2012, the County Regional generated approximately 13.1 million metric tons of greenhouse gases, with energy use and transportation continuing to generate the largest portion of emissions, similar to the national trends. Combined energy use in all sectors (residential, commercial and industrial) and transportation were responsible for 70 percent and 28 percent of 2012 emissions, respectively.
Eastern Pima County Greenhouse Gas Emission Trends – 1990 - 2012
Eastern Pima County’s Regional 2012 GHG Emissions by Source
Alt. fuels: Compressed Natural Gas (CNG) and Biodiesel (B-5)
City of Tucson 1990-2012
Similar to the County regional results, City community GHG emissions also increased (20 percent) from 1990 to 2012, primarily due to the transportation and energy use increases, reflecting the 28 percent rise in population growth. The City community’s total energy use emissions increased by 36 percent and private and commercial vehicle travel emissions rose by 26 percent over this 22-year period. From 2010 to 2012, total City Community emissions dropped by 1 percent. In 2012, the City Community generated approximately 6.7 million metric tons of GHG, representing over half of the County regional emissions.
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