Hydrogeochemical controls on brackish groundwater and its suitability for use in hydraulic fracturing: The Dockum Aquifer, Midland Basin, Texas
A creek flowing from Whitman Lake in the Tongass National Forest, Ketchikan, Alaska. The Tongass is Earth’s largest remaining temperate rainforest, and the largest national forest in the United States, stretching across 17 million acres of land in southeast Alaska. Photo by Beverly Molyneux.
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