Phys .org: Know your cement, get greener concrete Know your cement, get greener concrete. “An international team of scientists has created a new database of molecular dynamics models that simulate the properties of cement in all its varieties. It’s intended to help fine-tune this component of concrete and curtail emissions in its manufacturing process. Cement is used to bind concrete, the most-used construction material in the world and a significant source of atmospheric carbon dioxide. Its manufacturing contributes as much as 8 percent of the greenhouse gas to the atmosphere.”