But other pollutant controls may keep most of Arizona in compliance.
Federal regulations will cut sulfur dioxide emissions 85 percent at the smelters.
Prop. 122 blocks state from implementing federal programs deemed unconstitutional.
The co-ops' alternative would avoid a plant closure at a much lower cost.
Christine Jones discusses the Second Amendment at a campaign event Wednesday.
Navajo would close by 2044. Sierra Club may sue to block plan.
Environmentalists continue to push for a coal-free plant in Tucson.
COLORADO SPRINGS, Colo. — The head of the Environmental Protection Agency promoted proposed clean-power-plant rules to Western governors Tuesday, framing the plan as a way to deal with destructive wildfires and floods that have ravaged the region in recent years.
A community group and a retired air-pollution scientist filed separate lawsuits Wednesday challenging Arizona’s approval of an air-quality permit for the proposed Rosemont Mine.
Don’t worry, the Rosemont Mine isn’t likely to pollute the well-loved Davidson Canyon or Cienega Creek southeast of Tucson, says the Arizona Department of Environmental Quality.
The U.S. energy advantage is under attack. The shale-gas revolution has spurred billions in new investments and resurrected industries that had left the country.
Last Monday, Coronado National Forest Supervisor Jim Upchurch answered questions at a news conference about the Rosemont Mine.
A White House advisory body is now informally involved in the contentious Rosemont Copper Mine dispute.
The Rosemont Mine could worsen air quality in Saguaro National Park, disturb cultural resources — including human burial sites — and reduce water flows into Davidson Canyon and Cienega Creek, said the U.S. Forest Service.
The Forest Service laid much of the groundwork Friday for approval of the Rosemont Mine by releasing a final environmental report saying essentially that while the mine will cause negative impacts, it’s now clearly in line with nearly all environmental laws.
When Congress expanded the Renewable Fuel Standard in 2007, it did so with three important policy objectives in mind.
How did we reach the point where the government is promoting a dreadful fuel that gets worse fuel economy than gasoline or diesel, drives up food prices, damages car engines and has unintended environmental consequences?
A rare bird that could gain federal protected status lives and in some cases breeds along three streams and creeks near the proposed Rosemont Mine site, federal reports show.