Behind the looming global sand crisis

Even though sand can be found in nearly every single country on Earth, the world could soon face a shortage of this crucial, under-appreciated commodity. Sand use around the world has tripled in the last twenty years, according to the UNEP. That's far greater than the rate at which sand is being replenished. Here's what's behind the looming sand crisis. CORRECTION: This video has been updated to clarify how cement and sand usage correlates, according to United Nations Environment Program's data and estimations.
Wed, May 12 202112:00 PM EDT