Science
The maximum possible result from iron fertilization, assuming the most favourable conditions and disregarding practical considerations, is 0.29W/m2 of globally averaged negative forcing, which is almost sufficient to reverse the warming effect of about 1/6 of current levels of anthropogenic CO2 emissions. It is notable, however, that the addition of silicic acid or choosing the proper location could, at least mathematically, eliminate and exceed all man made CO2.
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