This low-carbon cement could build a greener world

It’s called LC3 or formally Limestone Calcined Clay Cement. It reduces carbon emissions from cement by 40% by swapping a key ingredient with cleaner materials. To make LC3, Scrivener and her colleagues at EPFL made one key change they replaced half the clinker in traditional cement with calcined clay and ground limestone. These don’t release as much CO2 when heated and can be fired at much lower temperatures.