The scene: a Manhattan art-house theater. The cause: a campaign against the gas drilling process known as fracking that's being led by more than 100 celebrities, including Yoko Ono, Sean Lennon, Robert Redford, Mark Ruffalo and Mario Batali.
"FrackNation" is a new documentary that attacks opponents of fracking for oil and gas, but it also raises a bigger question: Is it possible to criticize environmentalists without being a tool for big industry?
