Satellite spots world’s ‘largest’ methane leak in a Russian coal mine

A coal mine in a remote part of Russia is spewing out huge amounts of a very potent greenhouse gas in what has been described as the “biggest” leak of methane ever detected from a single facility.A coal mine in a remote part of Russia is spewing out huge amounts of a very potent greenhouse gas in what has been described as the “biggest” leak of methane ever detected from a single facility.