From Wikipedia

Earth Days

Earth Days is a 2009 documentary feature film about the start of the environmental movement in the United States.
The film has been described as both a poetic meditation on humanity's complex relationship with nature and an engaging history of the revolutionary achievements—and missed opportunities—of groundbreaking eco-activism.

Earth Days’ secret weapon is a one-two punch of personal testimony and rare archival media. The extraordinary stories of the era’s pioneers—among them Former Secretary of the Interior Stewart Udall; biologist/Population Bomb author Paul Ehrlich; Whole Earth Catalog founder Stewart Brand; Apollo Nine astronaut Rusty Schweickart; and renewable energy pioneer Hunter Lovins—are beautifully illustrated with an incredible array of footage from candy-colored Eisenhower-era tableaux to classic tear-jerking 1970s anti-litterbug PSAs (such as Iron Eyes Cody in Keep America Beautiful). Directed by acclaimed documentarian Robert Stone (Oswald's Ghost, Guerrilla: The Taking of Patty Hearst) Earth Days is both a poetic meditation on humanity's complex relationship with nature and an engaging history of the revolutionary achievements—and missed opportunities—of groundbreaking eco-activism."