Curious to see what the environmental movement looked like before An Inconvenient Truth came out? A new film called Earth Days wants to show you some green history -- by taking you all the way back to the 1950s!

Earth Days goes from the post World War II era to the first Earth Day celebration in 1970 to today, covering everything from the publication of Rachel Carson's Silent Spring to Paul Ehrlich's The Population Bomb. You'll hear from or about many eco-pioneers like Whole Earth Catalog founder Stewart Brand and Apollo Nine astronaut Rusty Schweickart. And of course, you'll see both the triumphs and missteps the environmental movement has made along the way.

Watch the trailer for Earth Days above -- then find out when the film's coming to a theater near you! Earth Days will play in select venues across the U.S. starting next month.

See the ghost of environmentalism's past
A new film called <i>Earth Days</i> looks at the history of the environmental movement in the U.S., starting in the 1950s.