Since the Clean Water Act, biodiversity in the Chicago River has increased, and there are now over 60 species of fish, including mimic shiner and brook silverside. Those species are spawning, and their offspring are also doing well, says Austin Happel, research biologist at the Shedd Aquarium, who focuses on urban freshwater systems.

Reset learns more from Karen Weigert, Reset sustainability contributor, director of Loyola University Chicago’s Baumhart Center for Social Enterprise and Responsibility.

For a full archive of Reset interviews, head over to wbez.org/reset.

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