CanWest News Service: Canada’s forest is emerging as an immense – truly immense – national and international player. The broad swath of often-scruffy timberland stretching from the Yukon to Labrador is one of largest stores of carbon on Earth, making it key to global warming and climate change. It holds an estimated 186 billion tonnes of carbon. That is about 27 times as much carbon as is released globally by the burning of fossil fuels each year. “Canada’s Boreal region is a …