Arizona would be the fifth state to gain “primacy” over the permitting of wells used to inject carbon dioxide underground.

Arizona carbon injection wells oversight transferred to state control, officials celebrate while environmental groups fear ...

Arizona will regulate thousands of wells across the state used to inject water, chemicals, and possibly even carbon, into the ...

Arizona’s three major utilities want to amp up nuclear power in Arizona to meet a growing demand for electricity.

WASHINGTON — The Apache Generating Station, one of the last remaining power plants in Arizona that use coal, is among 66 power plants nationwide granted exemptions by the Trump administration ...

The EPA rescinded ... "cumbersome red tape" for Arizona, Utah and other western states. It brings relief for local leaders who have long warned that the heightened permitting requirements that ...

The lawsuit aims to compel the EPA to reject an Arizona Department of Environmental Quality permit allowing a multinational mining company, South32, to construct and operate the Hermosa heavy metals ...