Earth Notes

The Colorado Plateau is one of North America’s human and environmental treasures. Ancient cultures have called this land of sun-baked deserts and lush mountain landscapes home for centuries. Earth Notes, KNAU’s weekly environmental series, explores the Plateau by telling stories of the intricate relationships between environmental issues and our daily lives.

Rooted in science and wrapped in human interest, the two minute long segments encourage listeners to think of themselves as part of the solution to environmental problems. Upbeat and informative, the program tries to foster hope and dampen despair about the environment, and motivate listeners to become more conscious and informed stewards of the Colorado Plateau.


On the Mogollon Rim in central Arizona a “tunnel to nowhere” is punched deep into solid rock—all that’s left of an ambitious scheme to build a railroad from the ponderosa pine forests in the north to the copper mines in the south.

Garry Rogers

This year a Prescott-based group marks three decades of work protecting some of Arizona’s last best places. On its 30th anniversary, the Central Arizona Land Trust is on the cusp of saving even more open space, ranchland, and streamside habitat.

Chicago Zoological Society

Mexican gray wolves were once common throughout the southwest United States and into central Mexico. But their populations were decimated in the nineteenth and twentieth centuries as human settlement exploded. Prey decline, habitat degradation, and federal predator control programs all but wiped out the animals. By the 1970s, Mexican wolves had almost completely disappeared from the wild.

Earth Notes: Plastics Recycling

Jan 2, 2019
City of Flagstaff Sustainability Section

How hard is it to go plastics-free? That’s a question many communities in the U.S. are asking since China stopped accepting our plastic waste.

Earth Notes: Nighthawk Overlap Zone

Dec 26, 2018
Alex Lamoreaux

If you see a bat-like bird with long, narrow wings zigzagging across the sky in early morning or evening twilight, it’s likely the common nighthawk. But in a small corner of northern Arizona, another nighthawk species is also found.