As Cape Town edged towards the feared “Day Zero” during its 2018 water crisis, engineers and policymakers analysed ideas that ranged from large-scale desalination to groundwater extraction. Among these, one of the ambitious proposals came from Nick Sloane, the South African salvage expert who is best known for leading the recovery of the Costa Concordia cruise ship.

As Cape Town edged towards the feared “Day Zero” during its 2018 water crisis, engineers and policymakers analysed ideas that ranged from large-scale desalination to groundwater…

Long before desalination plants became common and climate change intensified concerns regarding water security, one California oceanographer proposed an idea that sounded more…