I must have misunderstood when you claimed London wasn't as polluted as other places. And was Not 1 of the most polluted places in the UK.
Disagreeing, is not the same as misunderstanding.
Anybody claiming a centre of population is not more polluted needs to be able to explain themselves better.
I've explained more than once.
You say "London" like it's all the same.
I've told you that it isn't.
If you broke a fingernail, would you think a full-body cast appropriate?
And that's just the logic part of the argument.