Copper Mine Helps Boost Arizona’s Bighorn Population

Copper Mine Helps Boost Arizona’s Bighorn Population

One of the world’s most productive copper mines is also one of Arizona’s most reliable sources of Rocky Mountain bighorn sheep. The bighorns are not shy about entering the Freeport McMoRan open-pit mining operation—near Morenci, Ariz.—but predators are. As a result, there’s no natural check on sheep population growth.

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