Glacial expansion correlates deceasing amounts of co2 in the atmosphere and lower than those measured in 1950.
Scientists have demonstrated that refrozen water may increase the size of the glacier by adding mast to its base, During an ice age, colder global temperatures lead to recurring glacial expansion across the Earth's surface.
The decrease of CO2 in the atmosphere is because, Photosynthesis from plants and trees replaces CO2 from O2 (Oxygen).
Plants and algae also used CO2 for photosynthesis, Also, CO2 gets dissolved in the ocean to form fossil fuels.
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