Research Letter

Corporate Ecological Footprint: New Conversion Factors

Table 1

New fuel conversion indices used to calculate corporate ecological footprints.

FuelForest absorption rate ( 𝑡 C O 2 /ha/year)Emission factor with oxidation factor ( 𝑡 C O 2 /Gj)“Energy productivity” of forests (Gj/ha/year)

Solids

Anthracite3.66660.097337.7
Lignite3.66660.100236.6
Coal for coke making3.66660.093739.1
Other bitumen. coal3.66660.093739.1
Tyres (cement factories)3.66660.082044.7

Liquids

Gas-oil3.66660.073749.8
Gasoline3.66660.069053.1
Fuel oil3.66660.076048.2
General LPG3.66660.065056.4
Kerosene (not for aircraft)3.66660.071551.3
Oil coke3.66660.098337.3
Oils & lubricants3.66660.072950.3
Solvents (cement factories)3.66660.083044.2
Used oil (cement factories)3.66660.073050.2

Gas

Natural gas (dry)3.66660.056065.5
Butane3.66660.066255.4
Methane3.66660.054667.2
Propane3.66660.063657.7
Carbon Monoxide3.66660.154023.8
Hydrogen3.66660.00000

Source: “España. Informe Inventarios” GEI 1990–2004 (May 2006).http://portal.aragon.es/portal/page/portal/MEDIOAMBIENTE/CALIDAD_AMBIENTAL/CCLIMA/INFORMES/INVENTARIOEMISIONESGEI_1990–2004.PDF (last access: June/2008).