Having read Larry Niven's Ringworld, I'm brought to think of an eerie possibility this might create; that is - what if this currently non-biodegradable material

Having read Larry Niven's Ringworld, I'm brought to think of an eerie possibility this might create; that is - what if this currently non-biodegradable material becomes biodegradable? What if the colossal supply of this material (which as a hydrocarbon, had bound-potential-energy in it), over what's going to be a colossally long period of time, gives enough interaction surface that somewhere out there, a bacteria evolves that breaks down plastic? I hardly expect this would be the collapse of civilization or anything (as depicted in the book), but it really could have some nasty consequences. Plastic is relied on almost for precisely that reason - the fact that it doesn't decay/rust/collapse over time. That's why we use it for stuff like medical implants, safety gloves, food storage, sanitary containers ... you name it. It could lose its un-decayable and its sanitary property in one go. Kinda like the problem with overuse of antibiotics.