What Happens When We Run Out of Sand: The Global Sand Crisis

Sand is the most consumed natural resource after water. We use 50 billion tonnes annually - enough to build a wall 27 meters wide and 27 meters high around the equator. Construction uses 75%, glass production 15%, and electronics 10%. But not all sand is equal: desert sand is too smooth for concrete. River and coastal sand is needed, and it is being extracted faster than nature can replace it. 70% of Chinese river sand has been depleted. India faces severe sand shortages driving illegal sand mining and mafia violence. Alternative solutions: manufactured sand (crushed rock), recycled concrete, and desert sand processing are being developed but remain more expensive than natural sand.