Answer to Question #22875 in Inorganic Chemistry for fari
A significant contribution to atmospheric Carbon dioxide levels comes from the thermal decomposition of limestone in the manufacture of cement and of lime for agricultural purposes.
Cement works roast 1000 million tonnes of limestone per year and a further 200 million tonnnes is roasted in kilns to make lime.
What is the total annual mass output of carbon dioxide (in million tonnes) from these two processes?
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