Dayana Gonzalez and her classmates at Roadrunner School in Phoenix will soon have a new building on their campus that not only incorporates sustainable, environment-friendly features, but also demonstrates them for the students.

After years of rapid growth, residential solar power installations in Arizona are likely to slow down some in the near future as prices tick up and utility incentives shrink, experts say.

The Arizona Corporation Commission is criticizing recent actions by the U.S. Environmental Protection agency to clean up the state’s power plants.

Chinese solar panel maker Suntech Power Holdings Co. is closing its factory in Goodyear, Ariz., in part because of higher production costs.

Reversing a decades-old policy, the Arizona Corporation Commission will allow the owners of small utility companies to pass their income taxes off to consumers across the state.

A House committee on Monday held a bill to allow businesses to borrow against their property taxes to purchase energy efficient upgrades for their commercial properties.

A House committee today is scheduled to hear a bill to allow businesses to borrow against their property taxes to purchase energy efficient upgrades for their commercial properties.

House and Senate lawmakers are scheduled to hold a joint hearing Monday to hear testimony on the impact of a recent federal order instructing Arizona power companies to install pricey pollution control equipment at coal plants.

WASHINGTON – A consortium of federal and tribal agencies reported Jan. 24 that a five-year, $110 million project to clean up uranium contamination in the Navajo Nation had addressed the most urgent risks there.

Tucson Electric Power customers may be seeing a monthly bill increase by about $3 instead of a proposed $11.