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

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

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

The EPA rescinded ...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 ...