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Hubbard Brook Experimental Forest
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Line graph of hydrogen ion concentration in Hubbard Brook precipitation from 1963 to 2007, declining overall from about 75 to 30 equivalents per liter, with a peak near 95 in 1970.
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Hubbard Brook Experimental Forest: Media

forest, New Hampshire, United States
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Freshwater acidification at the Hubbard Brook Experimental Forest.
Graph of hydrogen ion concentration in water collected at Hubbard Brook Experimental...
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