Yes. We make two kinds of cement: portland-limestone cement and general use cement. The general use cement goes through the kiln at about 1,500°C for two or three minutes. When you make portland-limestone cement, you add limestone at the end of the process, so you're not using as much energy—petcoke, coal, natural gas. You reduce the energy. You have a net savings of 10% GHGs with that new cement.
On February 13th, 2018. See this statement in context.