Question

What is the main sink of atmospheric carbon dioxide on geological timescales

Answer 1

Silicate weathering is the most important sink for atmospheric CO2 on geological time scales. It removes CO2 from theatmosphere and increases the dissolved bicarbonate load of the oceans.

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Answer 2

Explanation:

The main natural sinks are the oceans and plants and other organisms that use photosynthesis to remove carbon from theatmosphere by incorporating it into biomass. This concept of CO2 sinks has become more widely known because of its role in the Kyoto Protocol.