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stuaxotoday at 1:51 AM6 repliesview on HN

I've needed my inhaler way less since the ULEZ came in.

Visiting London used to mean blowing your nose to black snot for a week afterwards, these days living in London it's pretty good.


Replies

tarkastevetoday at 4:54 AM

ULEZ massively reduced the amount of NO2, which is a trigger for asthma. It also seems to have reduced the hospital admissions for heart related emergencies.

Sources:

https://www.bbc.com/news/articles/c75q9d2pqyeo https://www.theguardian.com/environment/2026/jun/12/emergenc...

glenngillentoday at 2:52 AM

I've not lived in London for more than a decade. I always thought the black snot was from the Tube. Is it not?

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BrunoBernardinotoday at 8:03 AM

Anecdotal, but similar situation here for me (I don't need an inhaler, but visiting London around 2015 meant blowing my nose to black snot for a week, and then back in 2024 it was completely fine)!

elrictoday at 7:13 AM

More anecdata: I've been using my inhaler more since moving to a city with worse air quality than my previous location.

flipbradtoday at 6:07 AM

People don't fire their chimneys or have garden bonfires much any more, either.

smashahtoday at 4:10 AM

Pretty sure that's due to the tube.

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