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Carbon Emissions

Volume 470: debated on Thursday 10 January 2008

To ask the Secretary of State for Environment, Food and Rural Affairs whether the Government Carbon Offsetting Fund differentiates between domestic and international flights. (176169)

Emissions from domestic and international flights are calculated differently where the air travel data available allow. Calculation factors for short, medium and long-haul flights are taken from DEFRA’s Greenhouse Gas conversion factors for company reporting, available on the DEFRA website.

To ask the Secretary of State for Environment, Food and Rural Affairs what methodology is used by the Government Carbon Offsetting Fund to calculate the distance travelled to require one tonne of carbon dioxide equivalent to be offset. (176570)

The Government Carbon Offsetting Fund (GCOF) uses the DEFRA greenhouse gas conversion factors for company reporting to calculate emissions from air travel per kilometre.

GCOF also employs a radiative forcing multiplier of two to account for the additional impacts of emissions at altitude. Figures are presented in the form of CO2e (equivalent). Air travel distances are reported in kilometres by individual GCOF participants.