“When the last tree is cut, the last fish is caught, and the last river is polluted; when to breathe the air is sickening, you will realize, too late, that wealth is not in bank accounts and that you can’t eat money.”

As quoted in "Conversations with North American Indians" by Ted Poole in Who is the Chairman of This Meeting? : A Collection of Essays (1972) edited by Ralph Osborne, p. 43. In the article "When the Last Tree Is Cut Down, the Last Fish Eaten, and the Last Stream Poisoned, You Will Realize That You Cannot Eat Money" http://quoteinvestigator.com/2011/10/20/last-tree-cut/ "Quote Investigator" states that Greenpeace placed a paraphrased approximation on a banner in 1981, which has been widely propagated as a "Cree prophesy" or "Cree saying" and alternately attributed directly to Obomsawin, as in "A Thought for the Day" at Wordsmith (8 October 2014) http://wordsmith.org/words/virulent.html:
Context: Canada, the most affluent of countries, operates on a depletion economy which leaves destruction in its wake. Your people are driven by a terrible sense of deficiency. When the last tree is cut, the last fish is caught, and the last river is polluted; when to breathe the air is sickening, you will realize, too late, that wealth is not in bank accounts and that you can’t eat money.