Environmental Defense Fund Europe has been working on a new Greater London map that displays detailed information on the sources of health-harming air pollution. Search for or click anywhere on the map to get a breakdown of pollution sources – for both nitrogen oxides (NOx) and fine particulate matter (PM2.5) pollution – at that particular spot.
What does the map display?
The map uses data produced by Cambridge Environmental Research Consultants (CERC) using the ADMS-Urban model as part of the Breathe London pilot project.
Based on modelled data for 2019, the map:
The modelled data, which takes into account factors like wind and weather, is available on a 10 metre grid across London and provides the annual pollution concentrations experienced at 1m above ground level.
Which sources are included?
Pollution health impacts
The map displays two pollutants: NOx and PM2.5. NOx are a sum of nitric oxide (NO) and nitrogen dioxide (NO2) which, along with PM2.5, are the main air pollutants of concern in London. They are harmful to human health and are associated with adverse health outcomes like asthma, strokes and cancer.
London also has emissions inventories for NOx and PM2.5, meaning there is a detailed list of all the activities contributing to these pollutants across the city. The model that is behind the dataset requires these emission inventories.
This is the first time that modelled pollution sources data has been displayed in this detail across Greater London on an interactive public map. With a better understanding of which activities are causing pollution and where, leaders and communities can develop targeted solutions that clean the air and protect people’s health.
Please see here for a recorded demo on how to use the map, explain how the data was calculated and answer your questions.