A plan to extract millions of litres of water out of a Unesco world heritage site, send it by pipe to the coast and ship it to foreign markets for bottling has ignited a campaign over water resources in New Zealand. An export company is proposing to collect 800m litres a month of the “untapped” glacial waters of Lake Greaney and Lake Minim Mere, mountainous dams that are fed by rainfall on the Southern Alps.

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