Millions lack access to running water. Is the solution hiding in plain sight?

Back in Tucson, advocates for rain harvesting like Lisa Shipek are hoping the practice will spread as residents see its benefits.

The executive director of Watershed Management Group, a Tucson-based NGO, has built a showcase in her own backyard, which blooms with trees and native flowers. Behind the garage, chickens prance around a coop adjacent to a greenhouse.

“You start to value water in a different way, and it changes your behavior,” she said