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I don’t know much about them, but saw this on a hike and thought you folks here might lichen it!
(lemmy.world)
this post was submitted on 20 Jun 2025
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Lichen
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Lichens are sensitive to pollution, so cannot grow in places with bad air quality. As far as I know. Perhaps someone else can elaborate?
It varies a lot, some lichens are more sensitive than others. There are species you won't find in areas with poor air quality but some species will thrive in the the same conditions. I have even read about lichens growing in areas polluted by toxic slag.
https://www.cbc.ca/news/canada/edmonton/what-lichens-can-tell-us-about-climate-and-pollution-1.6989959
This person, is in the know!