After a nearly decade-long process, California has become the first state to require every new home to be built with solar power. This requirement, which goes into effect in 2020, was unanimously approved by the California Energy Commission.

A warm spring has already melted much of the limited snowpack that sits high in the Sangre de Cristo mountains in southern Colorado. Water is already flowing through the ditches near the rural village of San Pablo.

The Show regulrly checks in with Editorial Board of The Arizona Republic to talk about the big issues facing the state and the region — featured in the newspaper’s Viewpoints section.

The Central Arizona Project and the Arizona Department of Water Resources will meet next week in what could be a reboot of talks that stalled last year.

As our climate continues to warm here in the desert, sustainably growing food could become a serious challenge. Researchers at the University of Arizona are working to find new ways to approach agriculture and they’ve come up with one that’s garnering some attention.

After nearly a month of terse exchanges among water managers in Colorado, Wyoming, New Mexico, Utah and Arizona about Colorado River conservation strategies, representatives from the five states met Monday in Salt Lake City to hash out their differences.

A potential recall of leaders of the Colorado River Indian Tribes has roots in a potential deal to lease out tribal water.

Travelers and employees at Sky Harbor Airport will soon have a new healthcare option.

Green building practices have become more and more a part of urban planning. But, a conference getting underway Thursday in Phoenix looks for ways cities can benefit their local natural environments.