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1. Less than historically still has a quite high baseline compared to after ULEZ - if it was more polluted, presumably the change seen here would be more dramatic.

2. Definitely kickstarted it, but we're looking at taking that impact and continuing it for some 5 years after covid ended now.

3. You can look at the ULEZ map and it really covers everything but the outer tube line suburbs [1].

5. The control group in Luton, presumably, has the same lifestyle changes - it's not that far away (about 30 miles), so it is as close as you can get to a one to one comparison, not accounting for the fact that Luton is likely to be more deprived than London (especially in the council estates, which have horrible reputations).

[1] - https://tfl.gov.uk/ruc-cdn/static/cms/images/ulezdetailedmap...

by graemep2 hours ago|

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1. yes, but there was probably a bigger gain before. Confirmation would be good.

2. does the study separate impact during lockdown from after?

3. my question is whether it had the same impact everywhere. I would guess very much not.

5. the impact of those changes might not be the same from a much better baseline, nor are lifestyle changes the same in a big city and a small town.

by 79521 hours ago|

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Particulate pollutant levels decay exponentially and have a substantial drop off with distance. So levels across a large area (like London) are not the whole story.

by dabinat2 hours ago|

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Wouldn’t most of those effects also be in the control group too?

by graemep2 hours ago|

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Much smaller place and starting from a better baseline so they would not have experienced the same changes.