THE Huanghe (Yellow) River, China's second longest, carries more silt than any other in the world, as it flows through a vast tract of loess land on its middle reaches. Every year about 400 million...
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THE Huanghe (Yellow) River, China's second longest, carries more silt than any other in the world, as it flows through a vast tract of loess land on its middle reaches. Every year about 400 million...