Emergencies minister Vladimir Puchkov vows: 'We will defend both the city and the factories'.
New shipping link symbolises developing Arctic economy which can avoid eco-damage, says Putin.
Inspired by the Second World War, enterprising Siberian creates generator to power his vehicle without petrol.
Same phenomenon of discharge of gas hydrates 'led to crater formation in Russia and disappearance of ships in Atlantic'.
Current president of Sakha-based company leaves after 'difficult' relationship with senior officials in Moscow.
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.
Minister of Energy Alexander Novak is proposing to slash the mineral extraction tax on new developments for quarter of a century.