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| Description: Average precipitation acidities in the United States in 2006. The lower the pH, the more acidic the rain. Dying trees in Great Smoky Mountains National Park, where acid rain harms leaves and causes loss of nutrients from soil. Picture Stats: Views: 124 Filesize: 519.04kB Height: 1031 Width: 738 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=47255 |