“According to the World Business Council for Sustainable Development (WBCSD www.WBCSD.org),
‘Concrete is the most widely used material on earth apart from water, with nearly three tons used annually for each man, woman, and child.’ ”
“Carbon dioxide emissions from a cement plant are divided into two source categories: combustion and calcination. Cobustion accounts for approximately 40% and calcination 60% of the total CO2 emissions from a cement manufacturing facility. ”
“The manufacture of cement produces about 0.9 pounds of CO2 for every pound of cement.
Since cement is only a fraction of the constituents in concrete, manufacturing a cubic yard
of concrete (about 3900 lbs) is responsible for emitting about 400 lbs of CO2.”
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