Greenhouse gas and energy data

Greenhouse gas emissions (GHG) comprise carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, perfluorocarbons, sulphur hexafluoride and nitrogen trifluoride. The data are calculated using locally regulated methods where they exist. Where there is no locally regulated method, the data are calculated using the 2009 API Compendium, which is the recognised industry standard under the GHG Protocol Corporate Accounting and Reporting Standard. There are inherent limitations to the accuracy of such data. Oil and gas industry guidelines (IPIECA/API/IOGP) indicate that several sources of uncertainty can contribute to the overall uncertainty of a corporate emissions inventory. We have estimated the overall uncertainty for our direct GHG emissions to be around 2%.

GHG emissions are calculated using Global Warming Potential factors from the IPCC’s Fourth Assessment Report. For comparison, our Scope 1 emissions would have been 63 million tonnes in 2020 if we were to use Global Warming Potentials from the IPCC's Fifth Assessment Report.

We have updated some of our historical figures following a review of the data.

GHG emissions in this table do not include carbon offsets.

Methane emissions were converted to CO₂ equivalents using global warming potentials (GWP) from the IPCC's Fourth Assessment Report. For comparison, our methane emissions would have been 1.9 million tonnes in CO₂ equivalents in 2020 if we were to use global warming potentials from the IPCC's Fifth Assessment Report.

Includes Upstream and Integrated Gas businesses.

GHG emissions related to energy production (in the form of electricity, heat or steam) that was exported to another facility or public grid. This is a subset of our Scope 1 GHG emissions.