Climos is exploring techniques for naturally removing large amounts of CO2 from the atmosphere. One such technique, Ocean Iron Fertilization (OIF), is based on a natural process that is one of the Earth's primary natural mechanisms to remove carbon dioxide. Per the company, it has very high mitigation potential compared to other available methods, and also has relatively low cost. OIF works by improving the efficiency of natural phytoplankton production in the open ocean, adding to the very large natural amount of carbon sequestration that takes place in the world's oceans every year. Climos aims to seed the ocean with iron filings to sequester 1bn tons of CO2. Iron is a key nutrient for phytoplankton - microorganisms that "fix" CO2 from the atmosphere and store the carbon in their exoskeletons. Iron fertilization would encourage plankton growth, which would in turn remove more carbon dioxide from the atmosphere via their natural biological processes.