Because of the torrential summer rains, potentially driven by regional climate instability, the largest dead zone ever is predicted in the Mississippi river delta. Regardless of the climate influences, agricultural run off from "business as usual" economic activity is driving greater environmental impacts than any Ocean Iron Fertilization experiment ever has. As of yet, I am unaware of any intentional ocean fertilization experiment that has had the impact of a single dead zone of any river anywhere. The irony being that the worst case scenarios imagined for any small ocean fertilization experiment have yet to compare, by orders of magnitude, to the impact of dead zones created from accepted practices. The hippocracy being the deriders of ocean fertilization have nothing to say about the dead zones.
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