Similarly, plant life, Home tells us, broke up the water molecule and released oxygen into the atmosphere. Everything is linked, everything is part of a grand machine--the film makes this clear in scores of ways, and not just by telling us. Arthus-Bertrand reveals the intricate, breathtaking designs and patterns of glaciers feeding rivers, of animals feeding on plant life so more plant life can grow, of Australia's great Coral Reef's role in keeping the ocean in eco-balance. Of course, a big part of the story is the impact short-sighted humans have on these systems: the way we overfish, or drain deserts of scarce fossil water, or turn non-farming lands into perverse engines for agriculture. There is much to be alarmed at watching Home, but there is much to move one as well. --Tom Keogh "