Ten states elect their public utility commissions, which make big decisions about energy. This November, the stakes are high, especially in Arizona and Louisiana.

In more remote parts of the state, water-guzzling dairy farms have caused local residents’ wells to run dry. The drought on the Colorado River, long a lifeline for both agriculture and suburbia across ...

Arizona is, to borrow from the neighboring state of New Mexico, a land of enchantment. The southwestern U.S. state is home to ...

A typical large tree can suck as much as 88 pounds of carbon dioxide out of the air over the course of a year. Now scientists at the University of California, Berkeley say they can do the same job ...

Electricity rate increases for two big utilities including Tucson Electric Power accelerated in recent years, intensifying ...

Taiwanese semiconductor chemical supplier Sunlit Fluo & Chemical Co. Ltd. announced the opening of its first manufacturing ...

Gov. Katie Hobbs and the Arizona Department of Water Resources have made the first move toward regulating the use of ...

A Taiwan company has opened its first U.S. plant. The $100 million, west Phoenix facility will produce chemicals needed in ...

In the heart of this stunning area lies Red Rock State Park, a 286-acre natural sanctuary that showcases Arizona’s desert ...

Climate change may cause fall leaves to change later, putting trees at risk for frost damage. Even if they change on time, ...

The holdup caused a public outcry because the rule changes are intended to help the Agriculture Department stem the movement ...

"I'm loving every minute of this," said Melissa Semper, who is in a pipefitter apprenticeship she found through Fresh Start ...