You clicked, so we're going to get scientific with you now. Ammonia-Oxidizing-Bacteria (AOB), also known as “Nitrifying Bacteria,” are microorganisms that consume ammonia for energy and are present wherever a nitrogen cycle is taking place. This means wherever you find ammonia (their energy source), this class of bacteria will be found. The only anomaly to this is human skin, which we think is a rather interesting example of the effects of modern lifestyle. AOB also do not rely on solar energy or carbon (instead, they grow by consuming inorganic nitrogen compounds). The specific type of AOB used in our AO+ Mist is Nitrosomonas eutropha D23.