Vancouver Sun: Canada’s new ambassador to the United States said Alberta’s oil sands are facing a “disproportionate amount” of criticism in the climate-change debate — arguing North America risks missing “the big picture” on global warming if Canadian oil is singled out as the chief carbon emissions culprit. “One of the concerns that I have is that it represents so little of the emissions in North America. It’s getting a disproportionate amount of chatter,” Gary Doer said in an interview Sunday …