MIT’s groundbreaking new water-purifying invention is reusable, sustainable and chemical-free

Nearly one-third of the world has inadequate sanitation facilities, and unsafe water supplies cause millions of death each year. But filtration systems can be expensive, and often don’t even screen out all pollutants.

Researchers at MIT are trying to address the issue with a novel water purification system that uses small amounts of electricity. Watch the video above to see it in action, and learn how it might help tackle a seemingly intractable problem.