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NO2 and PM2.5 levels down significantly since 2015 but climate crisis may be driving rise in harmful surface ozone

The UK’s air pollution has dropped since 2015, scientists have found, but they have warned that dangerous levels are still reached too often.

Researchers found that nitrogen dioxide (NO2), which is mainly produced by traffic, fell by 35% on average at monitoring sites. Fine particles called PM2.5, which are small enough to get deep into lungs and are caused by burning wood and driving cars with internal combustion engines, dropped by 30%.

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