Ban on diesel cars and extending ultra-low emission zone mooted after DfT study raises concerns over nitrogen oxide levels

Mayoral candidates in London, the city with the worst air quality in Britain, have seized on the Department for Transport’s study of vehicle emissions to call for tighter controls on traffic pollution – including a ban on diesel cars.

An ultra-low emission zone in central London from 2020 will levy charges on all but the cleanest vehicles. But the DfT vehicle tests show that some diesels with a Euro 6 engine – classed as “ultra-low emission” and free to drive under outgoing mayor Boris Johnson’s plan – were emitting 12 times the permitted level of nitrogen oxide.

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Source: Guardian Environment