There’s a rising tension over water in the Southwest. Agencies that manage the Colorado River are attempting to publicly shame an increasingly isolated water agency in Arizona. The feud has the potential to upset negotiations over the river’s future.

Last month, the Tempe City Council voted to go 100% renewable by 2035. Not an easy, or a cheap, task. But it turns out, they’re getting a little help along the way from a class of Arizona State University students.

Commissioners in the Upper Basin of the Colorado River are talking about Arizona. They sent a letter to the head of Arizona’s water department, saying the state needs to resolve its internal disputes and finalize an agreement on how to deal with a future shortage on the river.

A squirrel at the Phoenix Zoo is showing signs of pregnancy, exciting scientists because there are only about 35 Mount Graham red squirrels left in the world. As Arizona heads into wildfire season, concerns remain due to the vulnerability of the endangered animal.

Maintaining the Salt River Project’s pipes, ditches and canals poses unique technical and workforce problems. In this installment of the Arizona Science Desk’s “Lifeblood of the Desert” series, we explore how SRP is working with Arizona State University on some novel helpers.

When we talk about walkable, sustainable cities, Phoenix is usually not the first city to come to mind. But one man believes that cities — even cities like Phoenix — can be friendlier to pedestrians and commuters alike.

Monarch butterfly populations are declining and the feds are evaluating whether the insects need some kind of federal protection. The U.S. Agriculture Department is also trying to help conserve the monarchs. Here to talk about all of this is Gail Morris, the coordinator of the Arizona-based Southwest Monarch Study.

In 1991, the Stockholm International Water Institute began giving the Stockholm Water Prize on an annual basis. It’s generally intended to recognize “outstanding achievements in water-related activities.” And this year, an ASU professor is sharing the prize with a scientist from the Netherlands.

A federal judge has rejected provisions in a 2015 federal management rule that unlawfully imposed roadblocks to recovery of the endangered Mexican wolf.