Iron fertilization! 1 kg of iron can fix 83000 kg of carbon dioxide and turn it into biomass. The idea is that you give algae the one ingredient to growth whi

Iron fertilization! 1 kg of iron can fix 83000 kg of carbon dioxide and turn it into biomass. The idea is that you give algae the one ingredient to growth which is very sparse in the oceans yet over-abundant on land. https://en.wikipedia.org/wiki/Iron_fertilization https://en.wikipedia.org/wiki/Iron_fertilization "Give me a half a tanker of iron and I will give you another ice age"