Nitrous bacteria are a type of microbe found in various ecosystems, including soil, water, and wastewater. These bacteria play a crucial role in the nitrogen cycle by converting nitrites into nitrates, which are essential nutrients for plants. Other synonyms for nitrous bacteria include denitrifying bacteria, which convert nitrates back into nitrogen gas, and nitrifying bacteria, which convert ammonia into nitrites and then into nitrates. In addition to these functions, nitrous bacteria can also help break down pollutants and organic matter in wastewater, making them a useful tool in wastewater treatment. Overall, nitrous bacteria are a vital component of many ecosystems and play an important role in maintaining environmental and human health.