The falling cost of desalination, thanks to technology improvements, is key, and the reuse of water can be cheaper still.
Contracts have been signed to deliver desalinated water in Algeria and Israel for 55–56 cents (36p) a cubic metre, and reuse plants can now turn sewage into drinking water for 40–45 cents a cubic metre, said Gasson. To compare, the average cost of UK drinking water is about 51p a cubic metre, though that also includes piping the water to the tap.
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