Iron fertilization is the intentional introduction of iron to the upper ocean to increase the marine food chain and to sequester carbon dioxide from the atmosphere . It involves encouraging the growth of marine phytoplankton blooms by physically distributing microscopic iron particles in otherwise nutrient rich, but iron deficient blue ocean waters. An increasing number of ocean labs, scientists and businesses are exploring it as a means to revive declining plankton populations, restore healthy levels of marine productivity and/or sequester millions of tons of CO2 to slow down global warming. Since 1993, ten international research teams have completed relatively small-scale ocean trials demonstrating the effect.
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