Trash and Coins Change the Colors of Yellowstone's Thermal Pools

December 21, 2014 3:43 PM

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(Photo : Pixabay) Blue green algae primarily causes Yellowstone Park geothermal pools' brilliant colors.

Many persons flock to the Yellowstone National Park in the U.S. to see the great ponds of shimmering, brilliant colors also known as the Grand Prismatic Spring and the Sapphire Pool.

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