Is water the new oil?It's the world's most precious commodity, yet many of us take it for granted. But that's all about to change. Special report by

The Green Changemakers

More than 97 per cent of all the water on the planet is salt water, and most of the freshwater is locked up in the Antarctic and Greenland ice sheets. It's the world's most precious commodity, yet many of us take it for granted. But that's all about to change.

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