The Earth may be 71 percent water, but there isn’t enough clean H2O to go around. Tech companies think they can help.

For example, one company is raising money to create water from air using only renewable energy. Uravu’s device flows air into a chamber containing desiccants such as silica that absorb the water in the air.

“The world is rapidly running out of freshwater, and by 2025, half of the world’s population will live in water-stressed areas,” Prakash Govindan, co-founder of Gradiant, a clean water solutions company, told Lifewire in an email interview. “Unfortunately, as water supplies continue to diminish, the world’s water consumption is rapidly increasing as economic growth drives manufacturing capabilities.”

Uravu Labs believes it can help solve the world’s water problems with air. Its prototype uses desiccant and solar heat to extract liquid water. The company recently raised seed funding to take its technology into production.