A German research ship, the Polarstern, is steaming towards a region off the coast of Argentina in the South Atlantic, where it intends to release six tons of iron sulphate over an area of 115 square miles. The scientists point out that this supports the idea that iron-rich seas result in greater amounts of carbon being sequestered in deep layers, because atmospheric carbon dioxide is drawn into the sea by the vast blooms of plankton at the surface.
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