Globe and Mail: Justin Trudeau handled Canadas internal climate-change talks with premiers like those international summits on the same issue: He took the half-loaf of vague principles that he could get and claimed progress, noting that there is an agreement to keep trying for more. The difference is that the Prime Minister has more power to use this deal to get what he wants next time than any host of United Nations talks ever did. No, Mr. Trudeau didnt get premiers to sign on to a specific national carbon...