Biology, 13.03.2021 03:30 janeou17xn

What is the primary cause of the change in carbon dioxide (CO2) levels starting at point X in the graph below? * The sun became much brighter than it was before then.
Humans began to farm and settle in towns since then.
Several volcanic eruptions happened since then.
The ocean started releasing much more carbon into the atmosphere.
Humans have burned large amounts of fossil fuels since then.

What is the primary cause of the change in carbon dioxide (CO2) levels starting at point X in the g

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What is the primary cause of the change in carbon dioxide (CO2) levels starting at point X in the gr...