Dying Caverns in Arizona Despite huge effort to protect them, Arizona's newly opened Karchner Caverns are dying. NPR's Howard Berkes asks, can it be fixed?

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Dying Caverns in Arizona

November 7, 200012:00 AM ET

Heard on Morning Edition

Dying Caverns in Arizona

Audio will be available later today.

Despite huge effort to protect them, Arizona's newly opened Karchner Caverns are dying. NPR's Howard Berkes asks, can it be fixed?