The LAEI 2022 is the latest version of the London Atmospheric Emissions Inventory and replaces previous versions of the inventory. Update May 2026: Emission datasets have been revised following discrepancies identified in the previous update (December 2025). Please refer to the Summary Note for further details. Emissions estimates of key pollutants (NOx, PM10, PM2.5 and CO2) by source type are...

The London Green Infrastructure Framework (LGIF), first published in January 2026, brings together key London-wide green infrastructure data in one place. You can use it to evidence, plan and prioritise the green infrastructure Londoners need. See http://www.london.gov.uk/london-green-infrastructure-framework for more information about its purpose and use, and https://apps.london.gov.uk/lgif/ for the map itself. This London Datastore page hosts: Two methodology reports produced by...

Air pollution is monitored by the London boroughs within their own area. There are a number of different monitoring methods available, including passive diffusion tubes. These diffusion tubes are small, passive samplers which measure the concentration of nitrogen dioxide (NO2) in the air at a certain location, providing a monthly average measurement. The diffusion tubes supplement the existing network of...

Update August 2025: The LAEI 2019 has now been superseded. Click here to access the LAEI 2022 data The LAEI 2019 is the latest version of the London Atmospheric Emissions Inventory and replaces previous versions of the inventory. Emissions estimates of key pollutants (NOx, PM10, PM2.5 and CO2) by source type are included for the base year 2019 and forecast...

The GLA have produced updates to the tree canopy cover and green cover assessments previously produced in November 2018 and January 2019 respectively (based on 2016 data).  The 2024 updates are based on data primarily from 2022 and estimate London’s tree canopy cover at 19.6% (±0.3%) and its green cover at 51.7% (±1.11%).  These estimates were produced via a ‘machine learning’ computer...

The GLA have produced updates to the tree canopy cover and green cover assessments previously produced in November 2018 and January 2019 respectively (based on 2016 data).  The 2024 updates are based on data primarily from 2022 and estimate London’s tree canopy cover at 19.6% (±0.3%) and its green cover at 51.7% (±1.11%).  These estimates were produced via a ‘machine learning’ computer...

The LAEI 2016 has been superseded. Click here for the full list of releases. Emissions estimates of key pollutants (NOx, PM10, PM2.5 and CO2) by source type are included for the base year 2016. Emissions for previous years 2010 and 2013 have also been recalculated, using the latest data sources (emission factors, activity data, ...) and methodology. Emissions projected...