EcoWatch: This weekend is the world premiere of the documentary This Changes Everything. The film is directed by Naomi Klein`s husband, journalist and filmmaker Avi Lewis (The Take) and it`s produced in conjunction with Klein`s best-selling book of the same name. It will premiere at the Toronto International Film Festival on Sept. 13 and will be available in theaters in the U.S. and on iTunes on Oct. 20.
Narrated by Klein, the film argues that climate change is the greatest threat humanity has ever faced,...