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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 4% for 2021.
GHG emissions were calculated using Global Warming Potential (GWP) factors from the IPCC’s Fourth Assessment Report. For comparison, our Scope 1 emissions would have been 60 million tonnes in 2021 if we were to use GWPs 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 credits.

Split by business or country may not add up to total due to rounding.
We have updated some of our historical figures following a review of the data.
We estimated the uncertainty of our 2021 Scope 2 GHG emissions to be around 6% (both market- and location-based methods).

The NCI calculation uses Shell’s energy product sales volume data, as disclosed in the Annual Report and Sustainability Report. This excludes certain contracts held for trading purposes and reported net rather than gross. Business-specific methodologies to net volumes have been applied in oil products and pipeline gas and power. Paper trades that do not result in physical product delivery are excluded. Retail sales volumes from markets where Shell operates under trademark licensing agreements are also excluded from the scope of Shell’s carbon intensity metric.
Acquisitions and divestments are included in the actual performance tracking with the target and reference year unchanged. Note that acquisition and divestments could have a material impact on meeting the targets.

Includes Upstream and Integrated Gas businesses.

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

Data are indexed to 2002, based on Solomon Associates Energy Intensity Index methodology.

Split by business may not add up to total due to rounding.

All spill volumes and numbers are for hydrocarbon spills of more than 100 kilograms to environment (land or water). We have updated some of our historical figures following a review of the data.

All sabotage- and theft-related spills in 2017-2021 have occurred in Nigeria.
We have updated the number of sabotage spills from 107 to 106 (as reported in the Annual Report) in 2021 following a review of data to exclude a spill from OML 17, as the spill occurred after the divestment.

We have updated the number of operational spills from 10 to 9 (as reported in the Annual Report) in 2021 following a review of data which indicates that a spill previously thought to be operational, was instead residual impact from a previous incident.

Nigeria includes SPDC onshore operations and SNEPCo offshore operations.
Nigeria includes SPDC onshore operations (10 operational spills in 2021) and SNEPCo offshore operations (zero operational spills in 2021).
We have updated the number of operational spills from 10 to 9 (as reported in the Annual Report) in 2021 following a review of data which indicates that a spill previously thought to be operational, was instead residual impact from a previous incident.

This category reflects the spills caused by exceptional natural events, such as hurricanes and earthquakes. 2017 data reflects the impact of Hurricane Harvey. 2021 data reflects the impact of Hurricane Ida.

All sabotage- and theft-related spills in 2017-2021 have occurred in Nigeria.

Nigeria includes SPDC onshore operations and SNEPCo offshore operations.

Fresh water figures do not include once-through cooling water. Breakdown may not add up to total due to rounding.

Split by business may not add up to total due to rounding.
We have updated some of our historical figures following a review of the data.