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Aerial view of water making its way into the parched Colorado River delta.

Greenhouse Gas Surprise in Colorado Water Flow

100,000 acre-feet released into delta had unepxected side effect, scientist says.

Public Meetings on Uranium Mining Near Grand Canyon

State agency schedules three gatherings to take comments on permit proposals.

Flooding underneath La Cholla bridge at the CaƱada Del Oro Wash in Tucson.

Rillito Anti-Flood Measures Troubling for Some Tucsonans

The project aims to mitigate future flooding but strips riverbed vegetation to do so.

National Parks Great Nature

Park Service Celebrates Centennial; Get in Free

Hope is to foster a new generation of stewards to protect the legacy of the parks.

As of 2005, scientists say there were 29 surviving populations of the New Mexico meadow jumping mouse in the Southwest, but biologists say they believe there may be fewer now.

Team 'Inks' Endangered Mouse in Arizona, New Mexico

NAU researchers confirm species' range in region using special inkpads.

AZPM Water Shortage Documentary to Air Nationally

Beyond the Mirage: The Future of Water in the West will be distributed through APT

Downtown traffic makes its way through construction in the area where the new street car will be.

Pima County Now Offers Air Quality Permits Online

24/7 service aimed at construction that could add dirt, pollutants to the air.

The Colorado River

Water to Keep Flowing to Arizona, Nevada from Colorado River, for Now

Despite record lows at Lake Mead, states aren't facing cutbacks in 2017

Pima County Supervisor Sharon Bronson was rescued from this car after it was washed off a road on the near north side of Tucson.

Rain Subsides, But Flooding, Dangerous Conditions Ongoing

Pima County Supervisor Bronson pulled from submerging car in north side wash.

Curb-to-curb rain runoff on East University Boulevard in Tucson in Aug. 9, 2016 rainstorm.

Flash Flood Warning in Effect in Tucson Metro Area Tuesday

Streets flooded throughout area; authorities advise staying indoors, using caution.

Botteri's sparrow is found mostly in Mexico but its habitat extends into small parts of southeast Arizona and Texas.

Hot and Humid for Humans, Bountiful for Nature

Plants and animals thrive with the summer monsoon rains.

How Much Carbon in Forests? Answer May Fund Restoration

New methodology would bolster sustainability efforts, developers hope.

A driver tries to ford a flooded road.

Weather Service: More Rain Soon, Drying Out by Week's End

The ground is saturated, causing flooding throughout Tucson Tuesday.

Drought May Hurt Female Trees More than Males: NAU Study

Male cottonwood, willow, juniper trees function better than females under stress.

Is Downtown Tucson a City Center for Everyone?

Also on Arizona Spotlight: The future of Tucson Clean & Beautiful; capturing monsoon lightning in images; "A Book I Love"; and a poem that recalls downtown Tucson's recent heritage.

Volunteers contribute time & effort to one of Tucson Clean & Beautiful's many tree planting campaigns.

A Greener and Cleaner Community

Tucson Clean and Beautiful gets new executive director after nearly 30 years.

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