From Mumbai to Tangier, Dubai to the Maldives, this investigation bares an emergency: the world's sand is disappearing.
Sand is one of the most-consumed natural resources on the planet. The United Nations estimates that mining of sand and gravel may exceed 40 billion tonnes a year.
Due to the high demand for sand, the planet's reserves are now being threatened: three-quarters of the world's beaches are already in decline.
Sand is used in our daily life in numerous ways. Houses, skyscrapers, bridges, airports and sidewalks are all partially comprised of sand, making it an essential requirement for the construction booms happening around the world.
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