John Abbott obituary

My friend John Abbott, who has died of cancer aged 63, was a talented mathematician and liberal-minded individual who improved the air that we breathe. John was the first (in 2005) to understand that nitrogen dioxide concentrations were not decreasing as expected. A decade later, this is now widely known and understood, with diesel cars being particularly high emitters, and has led to a revision of the vehicle emission standards in Europe.John was born and brought up in Bishop’s Stortford,