Described as one of the greatest sustainability challenges of the 21st century, how is it possible for the world to run out of sand?
It’s not all sand that is in demand, however. Angular sand is what is used in the construction of urban buildings everywhere because it binds more and forms stable concrete. This type of sand is created by the erosion of water.
What other types of sand are there? Can they replace angular sand? What would happen if we did indeed run out of sand? This video answers all these questions.
Courtesy of Interesting Engineering