New approaches to filtration and extracting moisture from air promise to alleviate the world's looming water scarcity crisis.
Filtration is being transformed by thin sheets of graphene, a carbon-based material invented in 2004 at Manchester University. Rahul Raveendran Nair, the university's professor of materials physics, says graphene has the potential to deliver large quantities of clean water via desalination and the removal of pollutants.
Meanwhile, improved technology for capturing water vapour from the air holds out hope for arid regions.
In April 2017, Prof Nair demonstrated that a...
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