About the energy needed for portland cement (1700J/g)
A quick calculation to find out how much energy was needed to create that much cement would be nice: 1,800,000,000,000,000 Gramm cement times 1700 Joule equals 3.06 Million Terra Joule = 3.06*10x18 ... So the retail price tag for coal would be 36.7 billion Euros or 43.61 billion USD. It should be mentioned that the price of coal is …
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