Challenge to polar doom warning from respected international expert Professor Peter Wadhams of Cambridge University.
The lake's level is falling, and Mongolian hydro plans would disrupt inflows, and could cause a 'tsunami' of water, say campaigners.
In beach resort of Listvyanka alone, 98 contaminated streams are disgorging sewage and chemical waste into the pristine waters of the world's oldest lake.
Part of Vasyugan Mire - the largest bog in the world - is to become a natural reserve this year, say reports.
Average temperatures in the north of the Kara and Barents seas were 4C to 5C higher than previous years.
'All forest wildfires extinguished' in Siberian Federal District, say officials, but peat flames still raging.