What would that be though? The macrophages would have to be supplied with the correct chemical? Seems like it would be easier to inject a fungus that can co exist with our cells. I recently read about Lichen in Sheldrake’s Entangled Life and how Lichen is not a single species or even in a single kingdom because it consists of a community of fungus and algae. In the same way that our cells encapsulated mitochondria, I wonder if the macrophages could work well with a (genetically modified?) fungi strain that could digest the plastic. I know this is far out and I’m hoping an expert on the subject could tell me if this has ever been discussed. Most people see fungus as a health threat but it’s an entire kingdom that we’ve only scratched the surface of understanding. If I were to go back to school I would probably study mycology.