Since hard-shelled organisms evolved about 550 million years ago, billions of tons of limestone rock have been produced from their shells. Limestone is made of calcium carbonate, with the formula CaCO


    Since hard-shelled organisms evolved encircling 550 darling years ago, billions of tons of limestone hurl enjoy been executed from their shells. Limestone is made of calcium carbonate, after a while the formula CaCO3.

Based on this, how do you reflect the equality of heavenly CO2 has transitional in the developed 550 darling years, and how has this forced Earth’s air? Explain your tally.

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