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re: The most polluted countries in the world
Posted on 4/17/24 at 9:30 am to h0bnail
Posted on 4/17/24 at 9:30 am to h0bnail
quote:
Of this list, I've only been to China. Seeing it only ranks 19th is kinda scary. Smog is pretty rough there in even medium sized cities.
If you look closely, this is specifically gauging PM 2.5, or the very fine (and therefore dangerous) particulate matter. Most smog is generally larger particulates, PM 10, etc. I imagine China would probably rank higher on a more expansive list.
1
Posted on 4/17/24 at 9:45 am to Joshjrn
To piggy back off of my last post, it looks like PM 2.5 tends to come from varying kinds of combustion. This is an article from a few months ago specifically about New Delhi, but also makes reference to a few US cities: LINK
quote:
Road dust and tiny bits of, well, stuff sent into the air by stone processing and other crushing operations are common sources of PM 10 pollutants. You can trace PM 2.5, on the other hand, primarily to combustion—fireplaces, car engines, and coal- or fracked (natural) gas–fired power plants are all major PM 2.5 sources. That’s why the five U.S. cities with the highest PM 2.5 levels are all in car-crazy California. Other problem cities have large coal-fired power plants (Pittsburgh), rely heavily on wood stoves for heat (Fairbanks, Alaska), or are prone to wildfires (Medford, Oregon)
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