The Harvard Initiative on Reducing Global Methane Emissions has released a research brief titled “EPA’s Municipal Solid Waste Landfill Methane Emission Rules.” The brief provides an account of the recent evolution of regulation in the United States to address methane emissions from landfills. An earlier version of the brief was prepared in support of a convening on methane emissions from landfills conducted by the Harvard Law School Environmental and Energy Law Program (EELP) in January 2024. The workshop –and the brief – were supported by the Salata Institute through the Harvard Initiative on Reducing Global Methane Emissions. The brief was written by Carrie Jenks and Hannah Dobie, Executive Director and Staff Attorney, respectively, at EELP.