CNN: Filmmaker James Cameron has been a titan of the box office for decades. So when he decided he wanted to create a series about climate change, it was only fitting that he would inject it with all the drama and suspense of one of his signature blockbusters. Cameron says the project "Years of Living Dangerously" was not an easy sell to Hollywood, but just as he has tackled so many other productions, he lined up enough talent including Matt Damon, Jessica Alba, Arnold Schwarzenegger and President...