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Historically,N₂ Only Entered the Atmosphere as a Result of Nitrogen

Question 38

Multiple Choice

Historically,N₂ only entered the atmosphere as a result of nitrogen fixation by bacteria and archaea.How has human technology affected nitrogen cycling?


A) Humans genetically modified plants to allow them to fix nitrogen.
B) Humans developed a method for artificially fixing nitrogen to generate fertilizers.
C) Humans use nitrogen as a source of renewable energy.
D) Human technology has had no effect on nitrogen cycling.

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