China's coal mine methane regulations have not curbed growing emissions.

By contrast, no source sector in India shows an obvious trend; the trend in total emissions from India is uncertain, and it is not clear what could be driving that trend, if one exists.

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Contribution of various source sectors We find a clear trend in CH 4 emissions from China’s coal sector while other source sectors do not show a corresponding trend (Fig. 5 ).

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We incorporate atmospheric CH 4 observations into an inverse model and find an increasing trend in CH 4 emissions across much of Asia, including in China and India (Figs. 2 and 3 , Supplementary Figs. 2 and 3 ).

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