Human activities can contribute excess amounts of nitrogen and phosphorus into water. Therefore,human causes of eutrophicationinclude the use of agricultural fertilizers. Other causes include sewage and aquaculture, which is the growing or farming of fish, shellfish and aquatic plants.
Answer: The asthenosphere is part of the mantle, however it is the only layer that holds semi liquid fluid.
Explanation: I just learned about this!!!!!
Answer:
Sodium oxide is the product
Explanation:
4Na+O2->2Na2O
1) c
2) c
3) b
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