David Ferris: For all its destructive calamity, global warming is hard to make into a disaster movie. One could argue that we just saw it a few weeks ago when superstorm Sandy drowned New Jersey, but the difficulty in tying a single storm to the overall climate leaves just enough room for doubters to equivocate. For a view of climate change that is crystal clear, watch the new documentary, “Chasing Ice.”
The movie is the creation of James Balog, the groundbreaking nature photographer who became fascinated with…