Glaciers in western China's Qinghai-Tibet plateau, known as the "roof of the world", are melting at a rate of 7 per cent a year because of global warming.
The figure is drawn from data at China's 681 weather stations over four decades.
The Tibet weather bureau shows that average temperatures there have risen by 0.9 deg since the 1980s.
Glacial 'roof' melting
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