It's not a great solution for a variety of reasons. First, it costs energy to extract the iron and dump it in areas of the ocean, so we'd have to do this in a w

It's not a great solution for a variety of reasons. First, it costs energy to extract the iron and dump it in areas of the ocean, so we'd have to do this in a way that generates less CO2 than it sucks out from the plankton (in which case, why do we need the plankton?). Second, it will cause large blooms which suck all of the O2 out of the water and fish will die off in those areas. Third, if we don't go ahead and reduce emissions, this will maybe buy time but not solve the actual problem. These sorts of solutions are only a good idea if we finally get moved over to a low carbon economy and still find we can't reduce warming any other way.