Atmospheric methane, a greenhouse gas, has also increased due to:
A) cattle raising
B) rice terraces
C) landfills
D) all of these
Correct Answer:
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Q12: Adding iron-rich particles to the ocean is
Q13: Decomposition of organic matter:
A) returns nutrients to
Q14: The second largest pool of carbon is
Q15: Although a small portion of the total
Q16: While the ocean is a large sink
Q18: Industrial nitrogen fertilizers now add more nitrates
Q19: In the natural nitrogen cycle, much of
Q20: Agricultural fields are closed systems so that
Q21: What is eutrophication?
A) It is a process
Q22: An early form of fertilizers used in
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