就在上个月，关于北极永久冻土层的甲烷气体释出及其对全球气候系统的影响，又出现了一番新闻报道，炒作，讨论和辩论的热潮。
This past month, there has been a flurry of news, speculation, discussion and debate concerning methane gas escaping from Arctic permafrost and its impact on the global climate system.
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