The Hult Prize competition, an international challenge known as the “Nobel Prize for Students” is open to college and university students with the aim of generating and incubating startup ideas to sustainably solve global social problems.This year’s theme is “Harnessing the Power of Energy.” For their entry, the Princeton students created a device called WellPower that provides solar-powered water purifiers to communities without access to clean water. The unit fills a critical global need for potable water. It’s also built in a sustainable way, using up-cycled solar panels and re-purposed automobile lithium ion batteries — both of which would otherwise end up in landfills — to power a water pump and filtration system. Read the full story on the website.