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many types of fungi that break down hardwood trees can also break down polyethylene, a common kind of plastic.
Prior research identified about 430 species of fungi and bacteria that are able to break down different kinds of plastic.
https://phys.org/news/2023-07-fungi-hardwood-trees-plastic.html
@johnverdon
there's been numerous reports about this possibility, but i've not seen any about its being used anywhere yet.