Clean water is in short supply in many parts of the world, but new technologies could help.

The Minnesota Pollution Control Agency recently purchased machinery to remove concentrations of hazardous substances known as PFAS. The high-tech system works by injecting outdoor air into contaminated water, turning PFAS into foam that can be separated from the water. It’s one of a growing number of devices that are helping make water safer.

“Less than one percent of the Earth’s surface area is actually freshwater,” Prakash Govindan, co-founder of Gradiant, a company that makes water purification technology, told Lifewire in an email interview. “It’s a very limited resource, and water stress is the first sign of climate change.”

To learn more read the article at LifeWire.com