The Interior Department is reviewing which projects it will cut and which it will keep under new policy priorities from the Trump administration.

Of all the Five C's, cattle ranching has endured with fewer changes in how things get done, but faces just as many threats to ...

Ten UC researchers and 14 alumni have been selected for one of the highest honors in the field of engineering.

Climate was an easy, low-cost product to sell in Arizona's early years, before rising temperatures changed the landscape's ...

Minnesota’s AG called the case against environmentally responsible investing “silly. But we got to stand up and never shrink ...

Copper retains much of the luster that lent Arizona the unofficial nickname "Copper State," and is king in rural Greenlee ...

Impeachment likely won't happen, but the idea is gaining traction as Republicans question the country's typical separation of powers.

A measure to ban geoengineering in Arizona has been amended to allow cloud seeding, which has been under study for years.

Athletes from WNBA, NFL and MLB are urging sports fans to join them in protecting oceans, vital for climate stability.

The new CEO of Octopus Energy US talks about clean power's future amid a hostile political environment, and why renewable energy is booming in oil-rich Texas.

The orders could affect Arizona through their impact on climate change and potential harm to the electric vehicle industry. There are no significant proven oil or gas reserves in Arizona, and analysts ...

One of Donald Trump's first acts at the start of his second term as US president was to pull his country out of the Paris Agreement on climate change - a move likely to have a more profound impact ...