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arealhero arealhero
wrote...
Posts: 7874
9 years ago
Acid precipitation results from human modifications of
a. the carbon and nitrogen cycles.
b. the carbon and sulfur cycles.
c. the carbon and phosphorus cycles.
d. the nitrogen and sulfur cycles.
e. the nitrogen and phosphorus cycles.
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Replies
wrote...
Valued Member
9 years ago
d. the nitrogen and sulfur cycles.
arealhero Author
wrote...
9 years ago
This is perfect, thank you for the answer.
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