Executive Director of Greenpeace International, Kumi Naidoo visits the Alberta tar sands and meets with First Nations people from Fort Chipewyan to hear about the impacts of the tar sands on their community. Canada's tar sands are an oil reserve the size of England. Extracting the crude oil called bitumen from underneath unspoiled wilderness requires a massive industrialized effort with far-reaching impacts on the land, air, water, and climate, releasing five times more greenhouse gases than conventional oil production.