Aquaculture-grown fish and seafood is becoming increasingly common. Worldwide, more fish than cattle are farmed. But the booming fish industry is causing environmental problems. Medications, pesticides and parasites are escaping from open-water farms and contaminating the ecosystem.
Scientists and environmental activists are sounding the alarm for the unique, UNESCO-protected ecosystem of Vancouver Island, which contains one of the world largest concentrations of wild salmon.
Global 3000 home page: http://www.dw.de/program/global-3000/s-11487-9798