TSMC, the world’s largest semiconductor manufacturer, has achieved better yield in its new Arizona factory than its Taiwan ...

The Arizona Lottery will continue its environmental conservation efforts by working with the Desert Botanical Garden ...

Candidates are vying for three seats on the state corporation commission, which has tremendous power over energy decisions.

U.S. presidents and vice presidents have visited Arizona for work and play since the 1920s. Here's where they stay, from ...

During a webinar on Wednesday hosted by the Potomac Institute for Policy Studies, Taiwan Semiconductor Manufacturing US ...

A big cool down is coming to the Valley this week as it's been a long, record-shattering summer with 80 days of 110-degrees ...

3. Credit: Joe Rondone/Arizona Republic PHOENIX—Approval of the construction of two gas power plants without public comment.

The contribution will go toward the garden's protection efforts for saguaros, monarch butterflies, and other endangered Arizona plants and native pollinators. "We are incredibly thankful for this ...

A Phoenix park got over 65 new trees Friday in hopes of reducing rising temperatures in the Maryvale neighborhood.

Voters can decide between two radically different philosophies over how to manage utilities and energy use in Arizona.