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A section of the barrier separating the U.S. and Mexico.

Federal Documents: Wall Likely to Adversely Impact Endangered Species

A FOIA request resulted in documents that appear to substantiate concerns of environmentalists and border communities.
An adult roundtail chub.

Group Seeks to Protect Roundtail Chub in Arizona, New Mexico

The Center for Biological Diversity says the large minnow has been reduced to a fraction of its range.
The late-afternoon sun on Lake Powell, April 2018.

Outlook for Colorado River This Year Remains Grim

April storms did not produce much snow to feed the Southwest's most vital river, agency says.
A Patagonia eyed silkmoth

Environmental Groups Plan to Sue to Protect Moth Found in Arizona

Group claims the Patagonia eyed silkmoth's lone U.S. habitat is a site near Patagonia.
The bright sun sets behind some trees near Soleng Tom Elementary School on Tucson's east side.

Hot Weather Forecast Warms Up Urban Planning Research

UA team investigating solutions to daily buildup of city heat.
Firefighters battle the Lizard Fire on a smoky hillside, 2017.

Managers Encourage Prevention Amid Growing Fire Seasons

One study predicts the area burned by fires will be six times larger in two decades.
Water is released from Lake Mead outside Las Vegas through Hoover Dam. The reservoir's level is at the center of a dispute over water conservation between the river's Upper and Lower Basin states, February 18, 2018.

Western Water Managers Meet To Relieve Colorado River Tension

Issue not resolved, but officials expressed regret over how the conversation about water release practices has played out.
A helicopter helps battle the Tinder Fire, in north-central Arizona, April 30, 2018.

Arizona Wildfire Grows but Weather Conditions Improve

The so-called Tinder Fire had consumed almost 18 square miles south of Flagstaff by Tuesday morning.
Google Maps image showing the location of the Buenavista del Cobre mine in the Mexican State of Sonora.

Mexico's Supreme Court To Hear Sonora Acid Spill Cases

Cases revolve around management of money for victims and extent of impact.
AZPM is an editorially independent, nonprofit service of the University of Arizona.

City Receives $300K EPA Grant for Soil Studies on 12th Ave

Money comes from the agency's Brownfields program.
Downtown traffic at Congress and the Freeway

Ozone Expected to Reach Problematic Levels in Tucson Tuesday

Ground-level ozone issues created by a mix of solar intensity and fossil-fuel emissions.
A man rests in the shade on a hot day in Tucson.

Hot Summer Could Mean Strong Monsoon

Hotter-than-normal June expected to usher in average or above-average rain season.
A fire truck returns after responding to the Frye Fire in the Pinaleño Mountains, 2017.

Dry Weather Pushing Tucson Area to Peak Wildfire Season

Lack of moisture, high temperatures and windy days make for prime fire conditions.
Boulder Basin at Lake Mead.

Feud Erupts Between Central Arizona Project, US States Over Colorado River

The states are accusing CAP of manipulating supply and demand of the water.
The lesser long-nosed bat.

Bat Key to Tequila Trade Gets Off US Endangered Species List

The announcement was good news to both wildlife conservationists and drinkers of tequila, as the bats are important pollinators of agave.
The entrance to Saguaro National Park east.

Saguaro National Park To Raise Entrance Fees

All rates go up $5 on January 1st.

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