 Methane emissions from urban areas are likely underestimated by a factor of three to four according to satellite data. This is due to the fact that the satellite data does not accurately reflect the amount of untreated wastewater being released into the atmosphere. Reducing the release of untreated wastewater can help reduce global methane emissions by 5% to 10% while also providing environmental and health benefits. This article was authored by Benjamin Defoy, James J. Shower, Alba Lorente, and others.