After questions from the public, University of Arizona Cooperative Extension experts examined trees and tested for diseases. The verdict? It's from a lack of water.

A few hours clearing brush and trimming trees could prevent disaster as temperatures rise and Arizona's drought continues.

Water doesn't recognize borders, but governments do. This conference focused on ways nations, states, tribes and others work together when water crosses borders.

You've probably heard of tariffs in the news about trade wars or politics, but what are they, and why should you care? In our series on tariffs, we'll explain what they are, how they work, and how they affect the lives and livelihoods of Arizonans.

Integrated Pest Management program research and education saves growers millions of dollars in crop loss prevention and helps keep pests from homes.

The Center for Urban Smart Agriculture brings together University of Arizona research, government resources and other stakeholders to help new and small farmers thrive.

Tree-ring data shows a decline in fire activity in North American forests, where its absence may contribute to more severe wildfires.

As director of the Desert Laboratory on Tumamoc Hill, Elise Gornish blends the university's renowned research on desert landscapes with its commitment to community outreach. "I'm trying to maximize every aspect of that," she said.

Citrus Greening is caused by a tiny insect that has been found as far north as Oro Valley, but the disease is limited to Nogales, Arizona.

Teens in the program got tips on how to lead directly from the mayor of Nogales and other community leaders.