Sierra Club

Melissa Sevigny

The Grand Canyon’s North Rim is overrun with bison. They trample wetlands and lake shores and devour the grass. That’s changing the ecosystem, a situation that’s been building for more than a decade… Now the National Park Service intends to do something about it. KNAU's Melissa Sevigny reports.

Alan English CPA/Flickr

Environmental groups say they’ve gathered more than 2.5 million comments in support of national monuments in Arizona. It comes as the Trump administration conducts a review of more than two dozen monument designations. KNAU’s Ryan Heinsius reports.


Ryan Heinsius

Environmental and social advocates gathered Tuesday outside Flagstaff City Hall to condemn President Trump and Arizona Senator Jeff Flake for failing to act on climate change. KNAU’s Ryan Heinsius reports. 


worldatlas.com

Conservationists have asked state officials to deny air-pollution permits for three uranium mines near the Grand Canyon. Arizona Public Radio’s Ryan Heinsius reports, the groups say the mines threaten public health and the environment. 


San Diego Zoo

The Arizona Game and Fish Department is calling on the Sierra Club to retract a recent fundraising letter. As Arizona Public Radio’s Ryan Heinsius reports, the agency says the group made false claims that uranium mining poses a threat to endangered California condors.


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