Producing one cubic yard of concrete takes about 1,700,000 BTUs or 500,000 watts of energy. Once those 500 kilowatts have been embedded in the final product it really tends to stay put for a very long time.
You could have yourself some big math fun if you multiply that number by the annual 7 billion yard global production figure I learned about in the posting titled “Concrete” from 6/18/’09.