Vancouver Sun: As Canada prepares to host the 2010 Olympic Winter Games, a new report warns global warming poses a real threat to the continuance of winter sports and Canada’s cultural identity. The David Suzuki Foundation says such iconic winter activities at risk include downhill skiing at Whistler, B.C., pond hockey on the Prairies, cross-country skiing in the forests of Quebec and skating on Ottawa’s Rideau canal. “These are just some of the images that define the Canadian identity,” …