Earth Notes

Wednesdays at 7:30 a.m. and 5:32 p.m. and Saturdays at 9:34 a.m.
  • Hosted by Tristan Clum

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.

Michael Collier

Next time you pass a mature ponderosa pine, notice its broad plates of orange-red bark etched with black crevices. That thick, puzzle-shaped bark helps the tree survive moderate forest fires by protecting the inside of the trunk from overheating; severe fires though can kill even the thickest-barked trees.


Earth Notes: Edgar Alexander Mearns

Jun 14, 2017
Smithsonian Institution Archives

On a cloudy, windy day in June 1887, Edgar Mearns climbed Mount Humphreys, Arizona's highest peak. Taking shelter behind a pile of stones, he was joined by a broad-tailed hummingbird—a fitting companion for one of America's greatest ornithologists.


Donald Chavez

A certain type of sheep that had almost slipped from memory is making a comeback in New Mexico. Dahl sheep are believed to have been raised by Spanish settlers about four centuries ago, but the breed was replaced over time by more common ones. 


DesignBuildBLUFF

Our homes and buildings use a lot of energy. Up to 40 percent of energy bills and carbon dioxide emissions are tied to private homes and commercial buildings. Experts say nearly one-third of this money and energy use is wasted, because many structures were built before modern materials and standards were around. 


DesignBuildBLUFF

In 1960, only 12 percent of U.S. households had air conditioning. Today it’s close to 90 percent. During the same time, the average new house has roughly tripled in size. As a result, air conditioners now consume an estimated five percent of all electricity that’s produced. 


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