Yet nickel capital Norilsk - the city with the highest industrial emissions - does not feature in the top ten.
With smoke having blown as far as the US and Canada, experts now say 'the trend is positive' in controlling fires raging from the Urals to the Pacific.
Krasnoyarsk and Novosibirsk suffering smoke pollution and infernos rage in forests after hot, dry weather.
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.
The Russian president's trip on Wednesday coincided with a marked improvement in levels of pollution, they claim.
Projects in Buryatia underway despite warnings of a crisis in pollution in world's deepest lake.
Journalist Kate Baklitskaya today begins an epic 3 month tour of some of Siberia's most iconic places.
TNK-BP, a Russian-British company, is under fire concerning 784 environmental accidents reported in 2011, compared with 20 by rival Lukoil.
Hi-tech project would use computer models to predict climate change and help with safe production of oil and gas in Northern Russia.
Residents complain of 'severe carbon monoxide poisoning' as satellite images show blanket of smoke across eastern Siberia.