What did Columbus Iselin mean when he said give a half a tanker of iron and I’ll give you the next ice age

Colombus Iselin was the name of the experiment/vessel. It is aquote by John Martin, the man behind the Iron Hypothesis. Martin’spoint in making the above statement was simply that, if true, theIron Hypothesis could make a difference to everyone alive, theworld over. It would take only a small amount of iron could have ahuge effect on the atmosphere. (Not that he had an ego oranything…)