The largest carbon sink on Earth is the world's oceans. The oceans absorb and store about 25% of the carbon dioxide (CO2) emissions produced by human activities such as burning fossil fuels and deforestation. This is primarily due to the process of oceanic uptake, in which CO2 dissolves into seawater and can remain stored for hundreds of years. The oceans' ability to act as a carbon sink is crucial in mitigating the impacts of climate change by reducing the amount of CO2 in the atmosphere.
