Last year, on the roof of a parking lot at Google's headquarters, engineers from XAlphabet's "moonshot factory""set up a panel to begin its first tests. The design, called an atmospheric water harvester, pulls in outside air, then uses fans and heat from sunlight to create condensation, producing clean drinking water drip by drip. In a new paper published today in Nature, the team calculates how much this type of device could potentially help give more people access to water that's safe to drink. Globally, as many as one in three people still drink unsafe water that can spread diseases. The study found that 1 billion people who currently don't have safe drinking water live in places where the device would function well. Because larger water infrastructure projects, like desalination plants, take many years to plan and build, the small devices could help fill the gap in the meantime. "This can leapfrog a lot of that and go directly to the source with a small device that's solar powered," says Jackson Lord, lead author of the paper. Alphabet ... wanted to be able to produce water at a cost of just one cent per liter. The team saw a path to reach 10 cents per liter, but not as low as one cent"so X decided to stop working on the project. But because the design could have a meaningful impact even at 10 cents, it's now opening up its data, prototypes, software, and hardware documentation ... so anyone can use the intellectual property and keep moving the work forward.