Ocean Microbes Produce 30 Percent Of Atmospheric Nitrous Oxide, A Potent Greenhouse Gas

From ScienceNews, "Marine microbes prove potent greenhouse gas emitters: The unsung climate warmers are single-celled organisms once considered a type of bacteria" by Janet Raloff:

Earth’s oceans emit an estimated 30 percent of the nitrous oxide, or N₂O, entering the atmosphere. Yet the source of this potent greenhouse gas has puzzled scientists for years. Bacteria — long the leading candidate — can generate N₂O, although the seas don’t seem to contain enough to account for all of the N₂O that the marine world has been coughing up. Now researchers at the Woods Hole Oceanographic Institution and MIT offer a more likely candidate: archaea.