Last reviewed on November 2, 2011 at 10:04

Documentation of California's Greenhouse Gas Inventory (First Edition - Last updated on 11/19/2007)

♦ Category: Energy

IPCC: 1A1cii - Fuel Combustion Activities - Energy Industries - Manufacture of Solid Fuels and Other Energy Industries - Other Energy Industries
Sector: Industrial : Pipelines : Natural Gas Pipelines

♦ Activity: Fuel combustion - Natural gas

♦ Greenhouse gas: Carbon dioxide ( CO2 )

► Year 1990 —

● Greenhouse gas emission estimate —

Amount: 0.726 tonne of CO2 Emitted (0.726 tonne CO2 Eq.)
Basis: Calculation
Calculation: [Fuel combustion] * [Heat content] * [Fuel CO2 emission]
Reference: Murtishaw, S., De La Rue du Can, S,. Price, L., Masanet, E., and Simcich, M. (2005). CALEB: California Energy Balance Database, September 12, 2005. Lawrence Berkeley National Laboratory, Berkeley, CA.

● Activity level used in calculations —

Activity: Fuel combustion = 13,269 scf of Natural gas
Basis: Data
Reference: Gough, A. (2007). Personal communication (data from the CEC's Quarterly Fuels and Energy Report) between Larry Hunsaker of the CA Air Resources Board and Andrea Gough of the California Energy Commission. Summer 2007.

● Parameters and Constants used in calculations —

Parameter: Fuel CO2 emission = 0.053 g / btu
Reference: USEPA (2007). Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2005. United States Environmental Protection Agency. EPA 430-R-07-002. Annex 2.1 (Tables A-31, A-32, A-35, and A-36). April 15, 2007. Washington DC.
Parameter: Heat Content = 1,032 btu / scf
Reference: EIA (2007). Energy Information Administration. State Energy Consumption, Price, and Expenditure Estimates (SEDS). Available online at:

● Greenhouse gas emitted per unit activity —

Amount: 54.7 g of CO2 per scf of Natural gas