Many of the world's waterways are dried up or polluted. In Argentina, a dam at Iguazu Falls affects the local population and environment. Yann Arthus-Bertrand also visits China and its disproportionate Three Gorges dam, as well as the Botswana Okavango, the Aral Sea and New York.
Sign in to join the discussion — comments are spoiler-gated to your watch progress.
Discussion starters
