Watch A Green Truth (2012) : Full Movie Online Free A Green Truth, intended as a sequel or sorts to An Inconvenient Truth, is a film about the world getting better. We already have the answers to climate change, the filmmakers say, and we just need to implement them. The film features positive solutions to climate change from Sweden, the leading EU country for renewable. A Green Truth focuses on biogas, which is created from human waste to fuel cars, buses and even family cooking.