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National Clean Power Plan emission limits were toughened slightly, however.

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Judge says state agency's action in issuing permit was "abuse of discretion." 

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Court hearing over permit issued by ADEQ to allow mine to operate.

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Levels were "way above any standards," says Geological Survey hydrologist.

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Agency draws flak from environmentalists for its handling of Trench Mine runoff.

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Toxic heavy metals may have leached into the water during heavy rains.

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Federal regulations will cut sulfur dioxide emissions 85 percent at the smelters.

Lab results from San Pedro River water in Mexico not yet known. 

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Phoenix car wash mogul pleads guilty; Asarco to pay Arizona fine; more.

Duncan and Connie Creed say they no longer can enjoy the glow of sunsets in their backyard like they could when they moved into their Green Va…

A community group and a retired air-pollution scientist filed separate lawsuits Wednesday challenging Arizona’s approval of an air-quality per…

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 D…

Last Monday, Coronado National Forest Supervisor Jim Upchurch answered questions at a news conference about the Rosemont Mine.

The U.S. Forest Service will issue a draft decision today approving the proposed Rosemont Mine in the Santa Rita Mountains southeast of Tucson.

The Forest Service laid much of the groundwork Friday for approval of the Rosemont Mine by releasing a final environmental report saying essen…

  • By Rick Grinnell Special to the Arizona Daily Star

Whether you are in favor of Rosemont Copper or opposed, your decision ought to be based on the most current facts.

The U.S. Bureau of Land Management is intensifying the debate over the proposed Rosemont Mine’s impacts on neighboring streams by bluntly chal…

Opponents of the proposed Rosemont Mine have filed suit, seeking to overturn a state decision awarding a groundwater protection permit to mine…

  • Tony Davis Arizona Daily Star

Opponents of the proposed Rosemont Mine are 0 for 3 in trying to stop the state from issuing the mine a groundwater-protection permit.

  • Tony Davis Arizona Daily Star

Rosemont Mine opponents claim in an appeal that Arizona's environmental agency approved an air quality permit for an outdated mine plan and ov…