In Canada's Arctic, climate change is already impacting communities and changing ways of life. According to scientists, Canada's northern climate is warming almost three times faster than the global average. As things warm up, the permafrost in the North -- that frozen underlying layer of ground -- is also melting. And that's threatening the way of life for many who live there. The ground is literally falling away beneath them. CBC's Susan Ormiston explores the effects of Canada's thawing Arctic permafrost and how it's impacting communities.