The Cement key result covers the fabrication of concrete, which emits 3 gigatons. Our aim is to cut those emissions to 0.3 gigatons by 2050.
To decarbonize cement manufacturing, we’ll need to find zero-emissions sources for heat. But the more important–and more challenging–task is to innovate the chemical reaction inside the kiln. Several companies are rethinking the process to capture carbon dioxide rising off the limestone clinker, the main ingredient in cement. Other groups are testing new materials and additives that can help form concrete with less clinker and thereby lower emissions.
As with steel, we need businesses to forge ahead with advance purchases of potential clean technologies.