Dr Rahul Nair demonstrates a graphene-based membrane device.
Many of us struggle to satisfy our thirst even though we live on a water world. That is because the Earth’s oceans are salty. Just 2.5% of the Earth’s water is freshwater, and of that, 60% is trapped in glaciers, 30% in groundwater (not all of which is accessible), and just 10% is on the surface in lakes and rivers.
