World's largest yellow waterfall turns 'green' in N China

The Hukou Waterfall, known as the world's largest yellow waterfall, is seeing clearer water.

It sits in a canyon at the intersection of northern China's Shanxi and Shaanxi provinces.

Looking from above, the running water looks green – a rare sight.

Experts say this is a normal scene caused by reductions in the volume of water, leading less mud and sand.

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