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Study: Arizona Not Preparing Enough for Climate Change

Existing policies based on current climate conditions, do not reflect climate change projections

Grand Canyon Bison Problem: Hunt Them or Relocate?

Park Service says herd of 600 overgrazing, draining precious water supplies.

UA Delegation to Attend United Nations Climate Conference

Faculty, students and community members to observe, network, conduct research.

El NiƱo Rains Predicted to Reduce Drought Severity

Above-average winter precipitation expected; will help, but won't end drought.

Interior Secretary in Tucson to Promote Free Parks for Students

Sally Jewell spent Wednesday in Saguaro Park with Santa Rosa Ranch students.

Female bighorn sheep

29 More Desert Bighorn Sheep Released in Santa Catalinas

23 ewes, 6 rams join more than 3 dozen already living in Pusch Ridge area.

Study: Warming Permafrost Releases Ancient Carbon

Influx of carbon in the air could speed climate change

On Aug. 5 2015 the EPA was investigating contamination of this old Colorado mine when it unexpectedly triggered a release of 3 million gallons of toxic waste.

Bill Would Reform Mining Law, Make Companies Clean Up

Instead of taxpayers paying to clean up mine sites, burden would fall to companies

Sunset on Mt. Lemmon in the Coronado National Forest.

Mt. Lemmon Smartphone Driving Tour Developed at UA

Free audio app transforms winding road into 'journey of discovery.'

Rebecca Brukman. 11/5/12.
Image of truck with City of Tucson logo.

Tucson Collecting Household Hazardous Waste Saturday

Opportunity to conveniently ditch unused cleaners, paint and other chemicals.

Groups Meet to Discuss Four Corners and Clean Air

Government, industry, citizens' groups gather at Durango, Colo., this week.

A California condor soars near the Grand Canyon. It is the most endangered bird in North America. It's also the largest, with a wingspan of about nine feet.

Wildfire Added to List of Threats to Condor Population

Study shows about half of wild birds live long enough to raise a chick

$150 Million Upgrades Coming to Gila County Copper Smelter

Upgrades are part of agreement with U.S. Environmental Protection Agency

A sign at an inactive Patagonia mine warns people of the dangers inside.

Plan to Seal Polluted Mine, Stop Runoff, Near Patagonia Ready

Lead Queen Mine spewed orange water after storm in 2014 and will now be plugged.

METRO WEEK: Keeping Tucson's Landfill from Filling Up

Moving the weigh scales and admin offices will allow landfill expansion.

More Bighorn Sheep Coming to Santa Catalinas Near Tucson

A recent pneumonia outbreak had threatened to delay the release.

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