In examining water samples preserved in glass jars over the last century, you notice a steadily declining pH. What is the most likely general explanation?
A. gradual eutrophication of water sources
B. rising atmospheric carbon dioxide levels leading to gradual acidification
C. dumping of acids in waterways
D. mislabeling of samples
E. None of the answer choices is correct.
B. rising atmospheric carbon dioxide levels leading to gradual acidification
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