A carbon sink is anything, natural or otherwise, that accumulates and stores some carbon-containing chemical compound for an indefinite period and thereby removes carbon dioxide (CO2) from the atmosphere. Globally, the two most important carbon sinks are vegetation and the ocean. Soil is an important carbon storage medium. Much of the organic carbon retained in the soil of agricultural areas has been depleted due to intensive farming. "Blue carbon" designates carbon that is fixed via the ocean ecosystems. Mangroves, salt marshes and seagrasses make up a majority of ocean plant life and store large quantities of carbon. Many efforts are being made to enhance natural carbon sinks, mainly soils and forests. In addition, a range of artificial sequestration initiatives are underway such as changed building construction materials, carbon capture and storage and geological sequestration. General Increase in atmospheric carbon dioxide means increase in global temperature. The amount of carbon dioxide varies naturally in a dynamic equilibrium with...