Yep. There's a lot of methane trapped in coal seams, depending on the type of coal. The old miner's name for it is firedamp, and it killed or injured quite a fe

Yep. There's a lot of methane trapped in coal seams, depending on the type of coal. The old miner's name for it is firedamp, and it killed or injured quite a few miners prior to modern equipment and safety measures. There's been a bit of a push to extract and use it in the US over the last few decades, but I think China pretty much just vents it to the atmosphere.