Scientists say there is growing evidence that rising temperatures were catalyst for massive unexplained holes in ground.
Dissecting them like surgical abscesses to release the gas seen as one solution to avoid future eruptions.
Scientists rush to site of latest tundra eruption - which formed a crater 50 metres deep - amid fears for homes and key industrial sites.
Local reindeer herder witnessed the tundra explosion that led to birth of new hole in river.
Reindeer herders find more craters in the far north in a deepening puzzle for scientists.
Pipes are built over bulging and unstable Arctic pingos prone to violent eruptions caused by 'thawing methane gas', as seen twice on the Yamal peninsula this year.