Water is becoming more precious round the world, yet the oceans are filled with the wet. If someone found a way to turn salty water into potable water easily and cheaply there would be a lot less thirsty people out there.

Stephen Salter at Edinburgh University has found a way to use the power of waves to remove salt from water. Desalination takes a lot of energy and by using waves, the energy cost obviously is a lot lower. The system is shaped like a duck and works by popping in the water and using that force to steam water for clean, drinkable goodness.

THe inventor also invented the first system to use wave energy for electric power and he was inspired to make this system from a trip to India.
“I visited India just after they had missed two monsoons and water was becoming a worry,” Salter told New Scientist. “I thought that using wave power for desalination would be a neat idea.”