Litter Bugs - Earth.com

What they don’t want, you see, is a repeat of what happened at Handkerchief Pool. Or the sad fate of a spring known as Morning Glory Pool. At one time this was one of Yellowstone’s most beautiful attractions, a brilliant blue splash of color against the backdrop of the park. But over the years, visitors have thrown trash in the waters, damaging its ecosystem and altering its otherworldly hue. Photo credit:

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