This Remark is a contribution of the International Carbon Undertaking (globalcarbonproject.org). We acknowledge help for normal analysis on methane from the Gordon and Betty Moore Basis (GBMF5439; R.B.J. and J.G.C.), the Stanford Pure Fuel Initiative (R.B.J., M.C.), US Nationwide Science Basis (CHE-1660611; E.I.S.), and the Australian Nationwide Environmental Science Program – Earth Techniques and Local weather Change Hub (J.G.C.). We additionally acknowledge H. M. Rhoda and S. Coffman for help with the manuscript and art work, respectively.