[MrPowers]

I love Medellin and lived there for many years, but the air quality is terrible and getting worse. You can talk with any locals and they say that the climate is noticeably different than it was in the past.

Medellin is surrounded by mountains and the contaminated air cannot escape. There didn't used to be a lot of cars, but now there is financing so the number of cars is growing significantly.

The hills are steep and old busses spew black smoke.

Here is some more info on pollution in Medellin: https://medellinguru.com/medellin-pollution/

Saying Medellin's temp decreased by 2 degrees Celsius based on "Mejorar el microclima hasta 2°C" is a misinterpretation. I think this article is quite misleading.

[jp191919]

Air quality in Bogota is terrible as well.

I think a good first step would be ditching all the diesel vehicles that have minimal/non-existant exhaust emissions systems.

[gfarah]

Many factories are relocating outside the valley, and the use of electric vehicles (including cars and motorcycles) is increasing.

[danlugo92]

> I love Medellin and lived there for many years, but the air quality is terrible and getting worse

The good thing about hill cities such as Medellin (sadly not a format available for big cities say in Europe or the US) is that you can choose your altitude, and at around 2000 thousand meters (the city starts at ~1500m) the air quality is not so bad, used to be worse years ago (maybe you lived there 2 or 3 years ago), but now it's much better.

> You can talk with any locals and they say that the climate is noticeably different than it was in the past.

Yeah, the city is much warmer compared to say 10 years ago, whether this is due to the city growing into previously-forest areas or /global/ warming I don't know... but yeah, locals agree it was MUCH colder 10 years ago...

> Medellin is surrounded by mountains and the contaminated air cannot escape.

See comments above about living at 2000m altitude (up in the mountains a bit away from the high-rise buildings and such, think of Beverly Hills or something like that.).

> The hills are steep and old busses spew black smoke.

As of now, there's almost no remaining old busses spewing black smoke anymore, but there's some cargo trucks still doing it.

> Saying Medellin's temp decreased by 2 degrees Celsius based on "Mejorar el microclima hasta 2°C" is a misinterpretation. I think this article is quite misleading.

I wouldn't know, but locals do say that it was a much more colder city in the past...