Federal hydropower from the Colorado River provides about half of Boulder City’s electricity, according to Joe Stubitz, the ...

A new study reveals that programs intended to reduce agriculture water use are the most effective means of stretching the Colorado River's scarce resources. This should be self-evident but tends to ...

In Arizona, water isn’t just a resource — it’s our lifeline. In Peoria, we’ve made it our mission to protect this vital asset ...

The Republic's climate reporter started her journey on the Arizona Trail with detours that were forced by wildfires and left for volunteers to fix.

The Arizona Republic's climate reporter, Joan Meiners, is biking the length of the Arizona Trail to document changes to landscapes and communities.