Cars with engines: can they ever be clean?

The number of dirty diesel vehicles pumping out toxic emissions on Europe’s streets is still rising three years after the Dieselgate scandal began, according to a new report. More than 7m such cars and vans remain on UK roads alone. There were 29m diesel vehicles whose emissions on the road were significantly higher than official laboratory-based EU limits when the diesel scandal erupted in September 2015. But that has now risen by to 43m, according to analysis by the group Transport & Environment (T&E). France has the most dirty diesels on the road, with 8.7m, followed by Germany’s 8.2m and the UK’s 7.3m.