Carbon Sequestration
Carbon Sequestration is a term in ecology describing processes that take carbon out of the biosphere. One big project is running in the Southern Ocean where iron is added to trigger phytoplankton blooms. The carbon or plankton cells have to sink to the deep water in 2000 to 4000 meter to be sequestered for ca. 1000 years. The sinking can be accelerated orders of magnitude when zooplankton prey on the cells and produce fast sinking fecal pellets or fecal strings, like the Antarctic krill. This process is called the Biological Pump.