The Center for Social Innovation at Un Techo para Chile recently revealed a water purification system that is a total knockout: a plasma-based system for water purification that can kill pretty much anything in the water, making it drinkable at a very low cost. How low? What about a few cents per liter? The forst working prototype can purify 2000 liters in 24 hours, at an energy consumption rate of 100 Watts to purify 35 liters every 5 mins.
The prototype, which looks like a Star Wars light saber (check the photos), is the most effective method for water purification available to date: high technology used for low income areas, and developed in a developing nation.