Academy Award winner Leonardo DiCaprio presents more than 50 of the leading scientists, thinkers and leaders of our time -- from all over the earth -- to discuss the state of the world, of humanity and what we all can do to make a difference in The 11th Hour. Climate change and the collapse of life-sustaining ecosystems are the challenges of our time. As part of a years-long global movement, Leonardo DiCaprio brings a film, a website and a world-wide effort to bring the peoples of the planet together and change the course of humanity.