The London Energy and Greenhouse Gas Inventory (LEGGI) shows greenhouse gas emissions and energy consumption from homes, workplaces and transport within the Greater London area.
It is produced on an annual basis to measure progress against the Mayor's carbon reduction targets for London. The LEGGI uses sub-regional energy (electricity, gas and other fuels) and carbon dioxide equivalent (CO2e) data published by the Department of Business Energy and Industrial Strategy (BEIS) for homes and workplaces, and data from the London Atmospheric Emissions Inventory (LAEI) for energy and CO2e data for transport.
BEIS Emission Factors (EFs) are used to estimate greenhouse gas (GHG) emissions from stationary and mobile sources of energy use in the LEGGI. These EFs are produced annually based on the national greenhouse gas inventory two years prior. For example, 2019 EFs are calculated using national GHG emissions and energy use inventory data from 2017. So, for this 2017 LEGGI we have applied BEIS 2019 EFs to 2017 energy use data to provide a more accurate estimate of GHG emissions in 2017 that is consistent with UK inventory data for 2017.
Interim results show that in 2017, London’s CO2e emissions were 30.3 million tonnes. This is a 33 per cent reduction on 1990 levels and a 40 per cent reduction since the peak of emissions in 2000. This is despite an ever-increasing population – an increase of nearly 30 per cent since 1990. London’s per capita emissions were estimated at 3.4 tonnes of CO2e in 2017, down from 3.5 tonnes of CO2e in 2016.
LEGGI datasets from previous years are also available for download below.
BEIS data on energy consumption can be found here, and regional GHG emissions here, although please note that for LEGGI we do not use weather corrected gas consumption data and so our GHG estimates differ from BEIS.
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