They’re basically man made chemical compounds that degrade very slowly. That was part of the appeal at first, but then they started getting smaller without breaking down into other things like organic molecules.
We’re just hearing about them mostly because they’re truly a new thing. Companies have tried to keep the public in the dark about the dangers, but they’re literally everywhere now.
This stuff has no nutritive value and is basically going to end up starving most of the current life on earth if it can’t be filtered out in some way. Certain fungus and wax worms are being found to be able to digest it, but it would take something on the levels of algae digesting it to actually do anything about them now
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