Describe the experiment of the columbus iselin. did it support or disprove john martin\'s hypothesis?

It demonstrated that adding iron to the ocean can incite an unobtrusive phytoplankton sprout, however insufficient to bring about major climatic change. Later investigations demonstrated more prominent microscopic fish sprout. General it bolstered the speculation, however, it wasn't the last word. 
It is as yet vague on the off chance that it would be conceivable or moral to incite worldwide tiny fish sprouts to diminish barometrical CO2