The amount of nitrogen produced by the Haber process, compared to natural fixation, is:
A) two times greater than the amount produced by natural fixation.
B) about equal to the amount produced by natural fixation.
C) about 10 percent of the amount produced by natural fixation.
D) about 1 percent of the amount produced by natural fixation.
E) not well known and varies with climate.
Correct Answer:
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