There's been an exciting new discovery in the fight against plastic pollution: mealworm larvae that are capable of consuming polystyrene. They join the ranks of a small group of insects that have been found to be capable of breaking the polluting plastic down, though this is the first time that an insect species native to Africa has been found to do this.
I had a foam insulation board that I used to insulate my chicken coop. The chickens pecked at and ate a bunch of it before I noticed and got it covered up.