Where to buy a car?

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grams in reply to @lemonade

I assume ULEZ, and, more relevant to us, the Bristol Clean Air Zone will tighten criteria at some point so that Euro 4 petrols are non-compliant.

For NOx at least the Euro 4 petrol limit is the same as the Euro 6 diesel limit, so if you banned Euro 4 petrols you’d have to also effectively ban diesels entirely to pass a rational basis test.

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lemonade in reply to @grams

you’d have to also effectively ban diesels entirely

This was very nearly the option they chose for the Bristol clean air zone (albeit charging not banning) so I don't think it's miles away from being implemented

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