Look: Used toilet paper 'all too familiar' a sight at Yosemite National Park - UPI.com

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July 9 (UPI) -- The U.S. National Park Service is pleading with visitors to Yosemite National Park to put a stop to "a sight that's become all too familiar" by not leaving their used toilet paper behind.

NPS officials wrote on the California park's social media channels that rangers recently came across "used toilet paper waving hello near Rancheria Falls -- a full roll too!"