In Europe: “diesel has been favored by public policy because it produces less carbon emissions than petrol, and is therefore better in the fight against climate change. But diesel produces far more air pollution – up to 15 times more than petrol (or unleaded gasoline).”
“The French and British capitals are grappling with dangerous levels of air pollution this week – conditions in winter help smog stick around. The mayor of Paris wants to ban diesel cars to stem it. Will London follow?”
Remember, this is all going on at the same time the UK is building diesel farms to save their electricity grid from the stupid decision to rely on wind.