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A carbon sink is a natural or artificial reservoir that accumulates and stores some carbon-containing chemical compound for an indefinite period. The process by which carbon sinks remove carbon dioxide (CO2) from the atmosphere is known as carbon sequestration. There are three main natural carbon sinks: Plants Soil Oceans Other examples of natural carbon sinks: Grasslands Agricultural lands Northern, boreal forests Tropical rainforests Peat bogs Freshwater lakes and wetlands Coastal ecosystems, such as seagrass beds, kelp forests, salt marshes and swamps Coral reefs Artificial Carbon Sinks-Manmade carbon sinks can be created or use existing underground formations, or even the oceans, to store CO2. The main artificial sinks are landfills and carbon capture and storage processes. Artificial carbon sequestration is a good example of man-made carbon sinks.

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