“The difference is that thawing wetlands releases ‘microbial’ methane from the decay of soil and organic matter, while thawing limestone — or carbonate rock — releases hydrocarbons and gas hydrates from reservoirs both below and within the permafrost, making it ‘much more dangerous’ than past studies have suggested.” WaPo: Scientists expected thawing wetlands in Siberia’s permafrost. What they found is ‘much more dangerous.’ (Anyone else sense a negative trend in climate news?)