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milkdudgirl145

Answer:

The CO2 emissions due to calcination are formed when the raw materials (mostly limestone and clay) are heated to more than 2500°F and CO2 is liberated from the decomposed minerals.

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tariqmariam614

Answer:

Cement is made by firing limestone, clay, and other materials in a kiln. CO2 is emitted from the energy used to fire the material, and the chemical reaction produced from the mixture when it is exposed to heat. ... Since concrete is such a widespread item, the amount of CO2 released in the industry continues to grow.

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