A ruling Monday from the U.S. Supreme Court could make it harder for state environmental officials to reach settlements with some polluters to clean up hazardous waste sites.

The Obama administration’s revised Clean Power Plan goals could be more palatable for Arizona, but big questions remain as to how they will affect the state’s utilities, their customers and the fate of the Apache Generating Station.

The Arizona Game and Fish Department and the Arizona Attorney General’s office filed a lawsuit today against the federal government over the Mexican gray wolf recovery program, saying the feds have failed to make a complete plan to recover the species.

The Department of Transportation says it has finished distributing 1,800 license plates that became available in May 2014 as previous owners turned in plates due to reasons that included moving out of state and selling qualifying vehicles.

The Sierra Club gave nearly every Republican legislator an “F’’ in the 2015 environmental report card it issued today – and gave Gov. Doug Ducey a “D.”

A national government watchdog group has hired a lawyer and is prepared to sue the Arizona Corporation Commission to compel the release of public records.

A study by researchers from the University of California, Irvine suggests that groundwater loss in the Colorado River Basin is not only higher than expected, but that other water sources may be inadequate to fill the gaps if it disappears.

Arizona’s spending on alternative fuels for its vehicle fleet continues to be relatively small even though the fleet is almost entirely capable of using such fuels.

I have served on the Arizona Ecumenical Council Earth Care Commission as both a committee member and as chairperson for about 15 years. Recently, I was asked to comment on the Environmental Protection Agency’s new carbon rule to curb the growing threat of greenhouse gases that contribute to global climate change.

I am delighted that the EPA has finally moved to abate the disastrous impacts of climate change by regulating carbon dioxide emissions from power plants. But, given the adverse reaction from the coal industry, the agency should have issued parallel regulations on emissions from meat industry operations.