Filmmakers from Richard Linklater to David Gordon Green to Whoopi Goldberg are bringing films to this year's Tribeca Film Festival.
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?
In the debate over natural gas drilling, the companies are often the ones accused of twisting the facts. But scientists say opponents sometimes mislead the public, too.

Matt Damon is hunting for some "great character faces" for a feature film he is making with director Gus Van Sant said to be critical about fracking for natural gas.
When it comes to 21st-century environmental and energy debates, a little knowledge is a dangerous thing. Especially when what little knowledge you may have is incorrect. And most especially when it's a lie.

An unaccredited film crew with cable giant HBO briefly shut down a House subcommittee hearing on Wednesday morning as Republicans and Democrats argued over whether to allow recording of the event.
Some insist Marcellus Shale natural gas is a huge economic boom for America, while others are certain it's an environmental catastrophe.
Lucy Walker is more worried about gussying up for the 83rd annual Academy Awards than worrying about whether Banksy will make his mark on Sunday's ceremony. The director of the transformative garbage dump chronicle "Waste Land" is among the nominees facing the infamously elusive street artist for the documentary feature Oscar.