PITTSBURGH (AP) — “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?

Fracking is a method of stimulating oil and gas from deep underground that’s led to a historic boom in U.S. production while also stoking controversy over its possible impact on the environment and human health. “FrackNation,” an independent documentary produced by Los Angeles-based filmmakers Phelim McAleer and Ann McElhinney, addresses the issue from an unusual perspective.

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