The World Is Running Out of Sand - The New Yorker
It’s one of our most widely used natural resources, but it’s scarcer than you think.
New Yorker, May 29, 2017
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甄选评议中2017年6月12日
已入选，准备制作ing2017年7月4日
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知识锦囊已完成并已上线2017年8月2日
