The planet doesn't have a problem, the planet doesn't give a shit about a little plastic. Species die and come for all sorts of reasons, new materials pollute and become sources of growth for a new species.

It's not the planet that has a problem, its our fucking civilization that has a problem. We depend on things being stabel... The planet doesn't give a fuck, our civilization can go the way of the sumer civilization, just increase the average temperature a couple of degrees more and see what happens