Will Sandstorms Doom China's Great Wall?

In the old days, it was invading hordes that was the primary threat to China’s 6,400km Great Wall, which acted as a buffer against the Mongols and other threats over countless centuries. Today, it is the weather that it fears most.

Western sections of the Wall are being reduced to “mounds of dirt” by sandstorms–and may disappear entirely within 20 years, according to the AP.

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