When the Supreme Court ruled this summer that the EPA could not force power plants to move away from fossil fuels, advocates worried that the justices had removed the “most effective tool for regulating and reducing greenhouse gas emissions.” 

Charging the federal government and Army are lying, environmental groups asked a federal judge Tuesday to order them to take another look at how the operation of Fort Huachuca is affecting the San Pedro River.

Arizona lawmakers and advocates said they were “blindsided” by the U.S. Forest Service’s abrupt announcement this week that it would halt negotiations on a proposed extension of the Four Forest Restoration Initiative. 

While Democrats work on two fronts to protect the Grand Canyon, conservationists disagree on one of the measures.

Attorney General Mark Brnovich is hoping to use federal environmental laws to force the Biden administration to resume construction of the border wall.

The future is murky for many Arizona rivers and streams now that changes to the Clean Water Act have narrowed federal oversight. Yet with no map or list delineating where state control begins, the number of vulnerable waterways in Arizona is immense.

Environmental groups have filed suit to remove most of the cattle off of 143 miles of the Verde River watershed.

Environmental groups are trying to halt a plan by the Bureau of Land Management to lease out more than 4,000 acres of land near the Petrified Forest National Park for oil and gas exploration.

Environmental groups will get a new chance to force the U.S. Forest Service to ban hunters from using lead ammunition in the Kaibab National Forest in a bid to protect condors.

The decision to cut more than 1,300 old-growth trees last summer in an Arizona forest has been criticized for breaking trust with the thinning project’s backers.