I imagine it depends on what happens to them. They’re largely made out of carbon, oxygen, and hydrogen, in a fairly high energy state. If they turn into microb

I imagine it depends on what happens to them. They’re largely made out of carbon, oxygen, and hydrogen, in a fairly high energy state. If they turn into microbe food in an aerobic environment, they probably turn into CO2 and H2O. In an anaerobic environment, they could turn into all manner of chemicals. https://en.m.wikipedia.org/wiki/Methanogenesis https://en.m.wikipedia.org/wiki/Methanogenesis