I am not so sure about that, I think highly concentrated iron is less productive for carbon sequestration than less concentrated iron. In addition because the f

I am not so sure about that, I think highly concentrated iron is less productive for carbon sequestration than less concentrated iron. In addition because the flow of plastic is constant it may lead to semi-permanent algae rather than a boom and bust of an algae bloom. The slow degradation of plastics is actually a feature in that sense, as a single piece of plastic will fertilize a larger area of the ocean. It may also lead to algae growing on the plastic and then dying, leading it to sink and no longer represent a threat to wildlife.