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Visitors appear to be steering clear of some U.S. national parks or cutting visits short because of pollution levels that are comparable to wh…
YELLOWSTONE NATIONAL PARK, Wyoming (AP) — A record number of people visited Yellowstone National Park in May.
YOSEMITE NATIONAL PARK, Calif. (AP) — Massive waterfalls in Yosemite National Park and rivers raging in mountains throughout the western Unite…
