Methane Levels Still Rising, Despite Global Methane Pledge NYT | Top Stories By: Max Bearak 19 September 2024 at 17:01 Satellite data shows the U.S. releasing more and more of the potent greenhouse gas into the atmosphere, researchers said, despite pledges to cut back. © David Goldman/Associated PressThe concentration of methane in the atmosphere is now more than two-and-a-half times greater than preindustrial levels.