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This report by Global Energy Monitor (GEM) provides a mine-level assessment of global coal mine methane emissions, finding that operating mines emit 52.3 million tonnes of methane per year. This volume rivals emissions from the oil and gas sectors and is significantly higher than many national inventories report. The analysis identifies China, specifically Shanxi province, as the primary source of these emissions and warns that proposed new mine projects could add another 11.3 million tonnes annually, potentially locking in emissions equivalent to the coal-based CO2 emissions of the United States.