An amazing statistic

I know that China has been building like crazy the past years, and it is obvious that in order to build stuff one needs cement (to make concrete). What I never realized is just how much cement China has used in the past years…the graphic below puts things into perspective…pretty mind-blowing ah?

 

 

(via Bill Gates; from Making the Modern World: Materials and Dematerialization, by the historian Vaclav Smil)