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Guest opinion

Schaller: Arizona's coming water shortage: Getting the story right

Pending cutbacks mean Arizona will lose fully one-third of our annual allocation of Colorado River water — with even more punitive cuts pending. As Lake Mead’s dire water level begins to capture public attention, a complex situation grows more challenging to understand even on a good day.... Read more»

Commentary

How the Antiquities Act expanded national parks & fueled struggles over land protection

As Americans anticipate summer vacation, many are planning trips to our nation’s iconic national parks, such as the Grand Canyon, Zion, Acadia and Olympic. But they may not realize that these and other parks exist because presidents used their power under the Antiquities Act, enacted on June 8, 1906, to protect those places from exploitation and development.... Read more»

Artificial floods in Grand Canyon could reduce non-native trout

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»