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A hundred years ago, who would have thought the one resource we all take so much for granted would become a precious commodity – water. Now, in many countries of the developed world water is in short supply.

t’s not just that less of it is falling from the heavens, although in some areas that’s true. It’s increasing populations, and the massive amounts of water used in industrial and chemical processes which are reducing the useable water available. In a greater number of countries today, if we want to use water, we have to pay for it, and the cost will continue to increase.