In late summer, I would swim and stream-walk a small section of the Raccoon River. While sedimented for decades now, the water was clear in the shallows. For a few years now, the water is pea-green from edge-to-edge. For decades and worse now, this water has strongly contributed to a vast hypoxia zone in the Gulf.
In the 1980s, I wrote about the wisdom of the river, focusing on the Des Moines River as a living, very open metaphor for the essential streaming dynamic of the universe that is within us as well in the streaming of our body metabolism and thought.