 Oil and gas production wells are a significant source of methane emissions in the US, but their contribution may decrease as the country transitions away from fossil fuels. However, some wells remain idle and can still emit methane, so it is important to monitor them closely. Additionally, orphaned wells can release dangerous substances into the environment, including methane, hydrogen sulfide, brine, and potentially other harmful chemicals. This article was authored by Amy Townsend Small and Jacob Hoshower.