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Bright blue hues mark the landscape of Moab, Utah, where mines produce potash, a potassium-containing salt that is a major component of fertilizers. Waters are dyed a deep blue to aid in the absorption of sunlight and heat, which speed up the process of potash crystallization. Reprinted with permission from Overview by Benjamin Grant, copyright (c) 2016. Published by Amphoto Books, a division of Penguin Random House, Inc. 

Images (c) 2016 by DigitalGlobe, Inc.
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