>> Why is the focus solely on the roads?
>>
>> Surely, having 5 international airports on the doorstep must be contributing something?
>>
>> Is there another city in Europe which has five airports so close?
5? London air is trapped in Thames Valley. Only two air corridors low enough to trap air there, LHR & LCY.
LGW is well south of the North Downs & STN and LTN are well north of the valley. Has to be said tho that LHR provides its fair share of pollution.
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