New York Times: Two years ago this month, an edge-pushing environmental entrepreneur and a company formed by a Native Canadian village set off a wave of international protest by dispersing a pink slurry of 100 tons of iron-rich dust over one of the 60-mile-wide ocean eddies that routinely drift across the salmon feeding grounds of the Gulf of Alaska. Their goal, in the face of steep declines in Pacific salmon catches, was to trigger a plankton population explosion with the infusion of iron, a vital nutrient thats...