You can download this week’s first feature here or listen in the embedded player.

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Environmental estrogens are chemicals that mimic natural hormones, and a new scientific study shows that they may be having an effect on fish populations in two Alberta rivers. Tyler Irving speaks with Hamid Habibi, professor at the University of Calgary, and one of the authors of this latest study.

You can see the complete episode here: TGM #201 – Where in the World is Don Gamble? (August 6, 2010)

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