Worldwide 32-50 billion t of aggregate (sand/gravel) are extracted pa. In 2012 enough concrete was poured to build… https://t.co/k6Hbpw8ag8
RT @TheStalwart: Incredible. One of the most crucial links in the supply chain, has been for years, built on the
October 21, 2021
RT @TheStalwart: Incredible. One of the most crucial links in the supply chain, has been for years, built on the premise that some workers…