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A young Chiricahua leopard frog, shown in a file photo from September 2010, is ready for release into a forest pool near Star Valley. Biologists raise the threatened species in captivity as part of a program that recently released its 10,000th frog into the wild.

The U.S. Fish and Wildlife Service is seeking to designate more than 11,000 acres in Arizona and New Mexico as critical habitat for the threatened Chiricahua leopard frog. Read more»

This uranium mine is located on land near the Grand Canyon. The Department of the Interior and Arizona Department of Game and Fish are working to put a hold on new mining claims in the area to protect wildlife and habitat.

The Arizona Game and Fish Commission on Wednesday endorsed a U.S. Department of the Interior proposal to withdraw more than 1 million acres surrounding the Grand Canyon from mining for the next 20 years. Read more»

The federal Clean Air Act establishes uniform standards for the amount of particulate matter that can be released into the air from facilities such as the Navajo Generating Station near Page.

Conservative lawmakers' efforts to assert Arizona's sovereignty extend to who's ultimately responsible for regulating the quality of the state's air and water. Read more»

Federal officials began reintroducing the Mexican gray wolf to Arizona in 1998.

A group GOP lawmakers wants to urge Congress to remove the endangered species designation for the gray wolf, including a subspecies reintroduced in Arizona in 1998. Read more»

Simulated floods from Glen Canyon Dam have been used in an attempt to restore sandbars along the Colorado River through the Grand Canyon.

Artificial floods over 14 years helped rebuild sandbars in the Grand Canyon but may have pushed non-native rainbow trout into an area frequented by the endangered humpback chub, Read more»

Angela Moreno, who lives on the outskirts of Sierra Vista, explains how a wayward bull ripped her fence off of the posts to graze in her lawn. A state lawmaker has introduced a bill to help people in her position recover damages from ranchers.

State Rep. Daniel Patterson, D-Tucson, has introduced legislation aimed at making it easier for property owners to recover damages when cattle wander off open range and encourage ranchers to prevent intrusions. Read more»