Amazing imagery of water across the world: rivers & lakes, dams & reservoirs. Occasional scenes of codirector Edward Burtnsky creating/assembling a photo book of the same material, so this is the motion companion to his book. Emphasis is on human intervention upon natural water paths, with a few interviews about the ensuing wreckage upon lives and the environment. The credits claim a 180:1 footage ratio. I calculate that’s 261 hours of raw footage.