In Siberia forests, climate change stokes 'zombie fires'

A small group of Russian volunteer firefighters in Siberia try to tackle a peat bog fire in the Suzunski nature reserve, 250 kilometres south of Novosibirsk. Smouldering more than a metre deep, this "zombie" fire can survive the harsh Siberian winters and threatens to turn into a huge forest fire every year -- a problem that Greenpeace's fire prevention chief in Russia says is a "climate bomb".