Sand is the most widely extracted solid material on Earth. The global sand mining industry removes roughly 50 billion metric tons of it a year, a pace that far outstrips the planet’s natural replenishment rates, according to a new report from the U.N. Environment Programme (UNEP). Excessive sand extraction from landscapes, rivers and coastal zones … Continue reading 19,000 Great Pyramids a year: Report flags unsustainable rate of sand mining