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Grand Canyon Damages Leads to Questioning Future of Bison

Iconic animal has made area its home; the herd has grown over years, and is now overgrazing park land, draining already low water holes, trampling archaeological sites.

UPDATE: N. AZ Blaze Worsens with High Winds, Possible Evacuation

Authorities say the so-called Slide Fire could reach up to 2,000 acres by nightfall; as many as 3,200 people may have to leave area.

Bringing the Colorado River Delta Back to Life

Expanse of parched earth seeing early revival following Morelos Dam floodgates reopening; environmentalists ecstatic.

San Ysidro Festival

The Friends of Tucson's Birthplace invite the community to celebrate more than 4,000 years of local history.

Saturday is 'Kids to Parks Day'

Gov. Jan Brewer, AZ State Parks encourage children, families to spend time outside by declaring the special day.

Melting Snow Won't Help AZ Rivers This Year, Forecast Says

U.S. Dept. of Agriculture anticipates water will be well below normal levels as snow thaws despite average amounts of snowfall through much of the West Coast.

Dust blows from Freeport MacMoRan mine tailings near Green Valley, Ariz. in July, 2013. The incident led Pima County to issue a notice that the company violated air quality standards.

Low Air Quality Caused By Dry Winter, Low Pressure Zone

Pima County Dept. of Environmental Quality has issued five air quality warnings in the past two weeks.

The first stage of a pilot project to bring life back to the Colorado River delta came to a close this past weekend. For two months, the pulse flow has been flooding parts of the delta in Mexico’s Baja California state.

Pulse Flow on CO River Delta in Final Days

105K acre feet, under 1% of annual average flow, has been released into delta; much smaller base flow will continue to deliver water to restoration sites over next 4 years.

A student from the Ironwood Tree Experience gazes out at the Las Cienegas National Conservation Area.

PHX to Develop Habitat Benefiting Area's Endangered Species

The city has reached an agreement with the U.S. Fish and Wildlife Service to maintain more than 900 acres of native wetland.

Shawnee Riplog-Peterson, curator of mammology and ornithology at the Arizona-Sonora Desert Museum, discusses the multi-state, binational breeding program involving bighorn sheep.

AZ Desert Museum Joins Bighorn Sustainable Breeding Program

6 U.S. institutions along with 2 in Mexico collaborating to increase genetic diversity of sheep; goal is to have 6 lambs by end of season.

Tohono O'odham Gets $200K for Study on Proposed Road

The U.S. Fish and Wildlife Service will help the tribal government fund a study for a project on State Route 86; goal is to find best possibilities for overpasses, underpasses.

N. AZ City Declares Water Crisis

Williams coping with drought, causing local officials to severely regulate water use earlier this year; current reservoirs are low.

Local governments are planning to extend the number and length of bicycle paths in an effort to increase ridership in our community.

Tucson 9th in Nation for Commutes by Bike

US Census Bureau releases commuting data; more than 5,500 people in city ride bikes to work, or 2.4 percent of the area's working population.

Spring Signals the Start of Honeybee Migration Season in AZ

Experts say the negative reputation of Africanized bees is not entirely deserved.

Tucson Drafts Updates to Urban Agriculture Code

Kristen Culliney and her family keep 8 hens in their midtown backyard, making them outlaws under current city zoning code, her local homeowner’s association rules.

Tucson Takes 2nd Place in Water-Saving Competition

Residents pledged to save 66 million gallons of water; placed behind Corpus Christi, TX.

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