Departments: Carbon Emissions Lynne Jones To ask the Chancellor of the Exchequer what methodology is used by his Department to account for its carbon emissions. John Healey The Treasury calculates carbon emissions by using carbon emission conversion factors provided by the Department for Environment Food and Rural Affairs (DEFRA). This can be can be found at: http://www.defra.gov.uk/environment/business/envrp/gas/envrpgas-annexes.pdf