Länk - 5% av världens koldioxidutsläpp är från cementframställning - ny metod kan ta ner den siffran
That might sound like hyperbole, but the reality is that for every ton of ordinary cement, known as Portland cement, a ton of air-polluting carbon dioxide is released during production. Worldwide, 2.5 billion tons of cement are manufactured each year, creating about 5 percent of the Earth's CO{-2} emissions