Russia, America, China and India have all raised voices of concern over hefty new levies for greenhouse gas emissions.
Scientists say there is growing evidence that rising temperatures were catalyst for massive unexplained holes in ground.
200 metres wide thermocirque seen weeks after scientists find funnel in the Yamal peninsula, caused by build up of methane.
Satellites show giant hole ringed by 20 'baby craters'.
Three man team probing the discovery is now 'missing in tundra', say Emergency Ministry officials.
New expedition in Laptev Sea suggests increase in the rate of underwater permafrost degradation.
New study warns of methane escaping from the sea floor due to degradation of submarine permafrost.
Subsea permafrost thaws faster than previously thought, Russian scientists say.
Visitors ‘risking their lives’ to witness spectacular formation of second cone on Klyuchevskaya Sopka in Kamchatka.