These ingenious floors use 70% less concrete and 90% less steel

A decade in the making, the new floors could mean a notable reduction in carbon emissions created by rapid urban development. The most polluting part of a building is hiding underfoot. Floors account for more than 40% of most multi-story buildings’ total mass, and many of the surfaces that hold up office floors and apartments are made of concrete. They represent a significant chunk of the emissions caused by constructing and operating a building over its lifetime. With the production of concre...