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highway != public transport

And pollution from bus or tram is much easier to control. Looking at you petrolheads who like to "Rolling coal"

Yes but in London you are never far from a highway you cannot get away from them.

In London now many if not most buses are electric.

Are we classing A-roads as "highways" now? If not, I have no idea what you mean when you say you're never far from a highway in London. There are no motorways through London.

Yes by the number of cars/lorries on them producing pollution.

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