[00:01.684]Each year,[00:02.183]enough water flows from the Tibetan plateau[00:04.682]to fill the entire Yellow River,[00:08.184]the mother river of Chinese civilization.[00:11.433]Today in China alone, 300 million people[00:14.683]depend on water from the Tibetan plateau.[00:30.184]With its profound effect on Asia's weather and water systems,[00:34.183]the Tibetan plateau helps to sustain almost half the world's population.[00:42.922]For the moment, at least.[00:49.425]Close to the summit of Mount Everest,[00:51.423]a forest of ice once covered much of the area.[00:56.182]But now, thanks to climate change,[00:58.924]much of it has gone.[01:02.433]Within the next 30 years[01:04.434]it's predicted that 80% of the Tibetan glaciers could disappear.[01:10.933]In many ways,[01:12.588]Tibet's fragile environment is the barometer of our world.[01:17.392]What happens to it today,[01:19.142]in time, will affect us all.