The US is 'at risk of a mega-drought future'

Dr Cook's new study is published in the journal Science Advances, and it has been discussed also at the annual meeting of the American Association for the Advancement of Science.

There is already broad agreement that the American Southwest and the Central Plains (a broad swathe of land from North Texas to the Dakotas) will dry as a consequence of increasing greenhouse gases in the atmosphere. But Dr Cook's research has tried to focus specifically on the implications for drought.

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Aquaponics is important and relevant to this issue because it consumes 90% less water than traditional agriculture.