The fourth edition of UNEP’s International Methane Emissions Observatory (IMEO)publication, An Eye on Methane: Invisible, but not unseen, takes stock of progress in harnessing a data revolution that can accelerate methane reduction on a global scale. IMEO provides open, reliable and actionable data to those who can use it to reduce emissions. Yet this report finds that even as the systems built to make this data revolution accessible and actionable for stakeholders have matured, engagement has not kept pace – despite mounting pledges to act.