Regarding Parengyodontium album that eats plastic, Sam from the UK succinctly nailed why caution is key: “I agree… about the dangers of introducing this fungi… outside its existing ecology. In fact, it occurs to me that if we encourage plastic-eating microorganisms by selective breeding or gene editing, we might end up hoisted by our own petard. The non-biodegradability of plastics is one of the main reasons we use them, after all.”