text: I hesitated to say before "11th Hour" actually opened how mind-numbingly dull it was for fear that I would ruin it for those interested in the subject of global warming. But at Cannes, when the film by Nadia Conners and Leila Conners Petersen was shown to journalists, nearly the entire room fell asleep. A Russian filmmaker told us afterward that she was the only person in the room who was awake at one point.