Yosemite's visitor surge revives concerns dating back 170 years
Phys.org ·
As the United States celebrates its 250th anniversary this summer, national parks are experiencing record-breaking visitation, with people flocking to enjoy the beauty and tranquility of the great outdoors.
As the United States celebrates its 250th anniversary this summer, national parks are experiencing record-breaking visitation, with people flocking to enjoy the beauty and tranquility of the great outdoors.