Feature: For America's national parks, and USNPS, a reckoning is on the horizon

WHEN I DROVE with forest ecologist Nathan Stephenson on the twisted Generals Highway through Sequoia National Park in central California last September, it was like a tour through the aftermath of a disaster. As we zigzagged up the road in his car, Stephenson narrated our journey blithely, like a medical examiner used to talking about death. “There’s a dead skeleton there,” he remarked, pointing to a bony oak corpse jutting toward the sky. A haze of nude branches clung to the distant slope.

“So all that gray up there is dead live oaks,” he said.

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