Carbon emission factors

This information is correct at the time of writing but is subject to regulatory revision and should not be relied upon.

The factors given below are from Annex A of UKETS(01)05 (Guidelines for the measurement and reporting of emissions in the UK Emissions Trading Scheme). These figures are consistent with the National Air Emission Inventory and with the carbon factors given in the generic PP3.02 (Underlying Climate Change Agreement for the [ ] sector).

Carbon emission factors 
Fuel                          kg C/kWh    kg C02/kWh  
Grid electricity Delivered1   0.117       0.43  
Grid electricity Primary 2    0.0453      0.1661  
Natural gas                   0.0518      0.19  
Coal                          0.0817      0.3  

1 The carbon emission factor for delivered electricity should be used when taking consumption as read from the meter.
2 The carbon emission factor for primary electricity should be used in calculations for Climate Change Agreements, where all energy use is reported in terms of primary energy.
3 Climate Change Agreement participants should use 0.117 kg C/kWh (0.43 kg CO2/kWh) for Coke.
4 Climate Change Agreement participants should use 0.0627 kg C/kWh (0.23 kg CO2/kWh) for LPG.