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由于大气甲烷是一种具有显著的温室效应和大气化学效应的痕量气体，因此，近年来大气甲烷浓度的持续增长引起了人们的广泛关注．大量证据表明，伴随世界煤炭产量的飞速增长，全球与煤矿开采、使用过程相关的CH4释放可能是近几十年来大气CH4浓度增大的一个主要原因。较新的估算
Since atmospheric methane is a trace gas with significant greenhouse effect and atmospheric chemical effect, the continuous increase of atmospheric methane concentration in recent years has drawn people’s attention. There is ample evidence that with the rapid growth of coal production in the world, the global CH4 release related to coal mining and use process may be a major reason for the increase of atmospheric CH4 concentration in recent decades. Newer estimates