Finding the missing methane emissions Recent publications in the media and scientific literature claimed that the officially reported methane emissions only account for three-quarter of the known total methane emissions world-wide, with especially a mismatch in countries with a limited on-ground data collection. In the project CHEF we will develop an inversion algorithm, not only to find the hotspots of emission, but to derive a complete gridded field of methane emissions per region, which allows us to identify and quantify these missing emissions. CHEF will be embedded in the KNMI-Global initiative to support countries of the Global South.