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No body really knows.

Many millions of tons of CO2 are held in solution in the oceans. The oceans hold many other chemicals in solution, not just sodium chloride (NaCl).

Over geoloigical time, the Earth has heated up and cooled down (Ice Ages). This heating and cooling affects the oceans.

When any liquid (the oceans included), warm up they hold less gas in solution. This is evidenced by boiling water, the gases (oxygen etc) dissolved in water are released into the atmosphere.(bubbles).

So when the oceans become warmer, then less CO2 gas will be held in solution, and released into the atmosphere. On cooling down it will be re-dissolved into ther oceans.

Since this all occurred over thousands of years, there is no written record of the changing proportions of gases in the atmosphere. Volcanies, when erupting also release carbon dioxide, together with other gases.

Modern technologies do release CO2. The best way to remove it from the atmosphere is to grow more green plant life. Green plants absorb CO2 , and under to process of photosynthesis, the CO2 is broken down into oxygen and released back into the atmosphere. The carbon component is held in the plant as biomass.

I question if any one has investigated/researched the rate of reaction of photosynthesis, but it must be fast, because there is more oxygen in the atmosphere than CO2. Because we don't see or hear this reaction going on, we cannot easily tell if it is fast or slow. Photosynthesis only occurs when there is UV light (daylight) present.

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lenpollock

Lvl 17
3mo ago

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