甲烷“大爆发”将使全球温度提高10℃　　　　由于全球气候变暖等因素，位于西们利亚西部永久冻结带上全球最大的冻泥炭沼泽开始融化......

The 6th International Symposium on Permafrost Engineering was successfully held in China in September 2004. About 150 sc......