Jon Turteltaub, director of the National Treasure movies and most recently another Nicolas Cage vehicle with The Sorceror's Apprentice, is set to tackle some rather more realistic events, with the news that he's developing a story about the founders of the Greenpeace movement.

Bob Hunter and Rex Weyler, for it was they, turned a disparate group of pacificists, environmentalists, scientists, sailors, musicians and teachers into the anti-nuclear, anti-whaling group that we all know today. And helpfully they've both written books about it, which will form the basis of this film: Weyler's 'Greenpeace: How a Group of Ecologists, Journalists, and Visionaries Changed the World' and Hunter's Warriors of the Rainbow: A Chronicle of the Greenpeace Movement.

Turteltaub and his producers are currently looking for writers, and rather excitingly are in early discussions with West Wing creator Aaron Sorkin. He, of course, recently wrote the much talked-about script for the Facebook movie The Social Network, so would seem a good fit for the material. What's more, if The West Wing is any guide he'd be sympathetic but not beholden to Greenpeace's politics.

But of course it won't all be about politics: Greenpeace got up to all sorts of adventure on the high seas, disrupting nuclear tests and whaling operations, getting under the skin of government and big business. and generally putting their woolly jumpers through the wringer. So think of this as Pirates with politics, or Waterworld with a bit of land now and again and fewer gills.