Answer: Oceans
Notes: The oceans are the largest carbon sinks, absorbing about 30% of the carbon dioxide produced by humans. This process helps mitigate climate change by reducing atmospheric CO2 levels. Interestingly, marine phytoplankton, which are microscopic plants in the ocean, play a crucial role in this absorption. They contribute to the oceanic carbon cycle and are responsible for producing a significant portion of the world's oxygen, highlighting their importance in both carbon sequestration and global ecology.
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