What Causes Air Pollution to Spike in Springtime?

2 min read Original article ↗

A recent (unreported) air pollution event turned me from air quality specialist to news sleuth: what was causing this and why aren't the public being informed?

Peter Knapp

Photo by Tim Marshall on Unsplash

Air pollution across southern England on Mon 10th March 2025 was extremely high. Friends of mine were taking days off work due to asthma, while increased air pollution is likely to have caused an increase in hospitalisations.

However, there was no media reporting. No headlines. No government information. A total media blackout. This was just three days after a news frenzy on how traffic regulations in London have made the air so much cleaner.

As an air quality specialist, I wanted to know what was causing this and to report this to the public. I suspected animal agriculture played a role. So I undertook my own detective work…

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Air quality data from citizen science monitors across northern Europe, from https://maps.sensor.community/. Accessed on 10th March 2025.

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Particulate air pollution (PM2.5) in London’s Honor Oak Park monitoring station from 1st Jan 2025 to 11th March 2025. Data accessed on 11th March 2025. The World Health Organisation (WHO) guidelines are shown with dashed lines. Source: https://aerosolscienceerg.shinyapps.io/Aerosol_Science_Dashboard/

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