Is salmon farming ever sustainable? For years, many marine biologists have argued that the floating, open-ocean net pens that produce billions of pounds of salmon per year also generate pollution, disease and parasites. In some places in western Canada, the open-ocean salmon farming industry has been blamed for the collapse of wild salmon populations in the early 2000s — though other research has challenged that claim. But now, a few salmon farms have moved inland, producing fish in land-locked cement basins separated from river and sea.
Alastair Bland reports.
http://kplu.org/post/sustainable-salmon-farming-maybe-if-you-head-inland