What is a potential role of methanogens in global warming?
1) Methanogens produce methane, which traps more heat than carbon dioxide and may contribute to global warming.
2) Methanogens convert carbon dioxide into methane, removing carbon dioxide from the atmosphere and effectively decreasing global warming.
3) Methanogens convert methane gas produced by organic waste into carbon dioxide, decreasing global warming.
4) The methane that methanogens produce during sludge digestion of wastewater treatment is burned so that it does not contribute to global warming.