In Lima, Peru, water is hard to come by. It sits on the northern edge of the Atacama, the driest desert in the world, meaning the city sees perhaps half an inch of precipitation annually. That’s not enough to sustain a growing population.

The University of Engineering and Technology of Peru (UTEC) had a solution.

They set out to create a billboard that would convert Lima’s humid air into potable water. And it works! See the future of water production!