Iron ocean seeding

Carbon sequestration - the removal of carbon dioxide from the atmosphere - is an active area of research. Deep-ocean burial is one method being considered. Another is the enhancement of marine photosynthesis by seeding the oceans with iron. Few people are aware that at least 50 per cent of the photosynthetic activity on Earth occurs in the oceans, even though marine phytoplankton make up only about one per cent of the biomass.