Inter Press Service: Melting sea ice caused by climate change and government inaction is putting polar bears at extreme risk in Canada as a species over the next 50 years, according to local environmental groups. In northern Canada and Alaska, drilling for potential oil and gas is also drawing criticism from civil society organisations. Rachel Plotkin, a biodiversity policy analyst with the David Suzuki Foundation, told IPS, "The main threat is the melting of sea ice which affects the hunting …