-Consider the global nitrogen cycle depicted in the accompanying figure. How are humans altering this cycle?
A) industrial nitrogen fixation
B) nitrogen lost to the atmosphere
C) reduction of nitrogen available to terrestrial ecosystems
D) reduction of nitrogen fixation by bacteria
E) permanent burial of nitrogen in coastal environments through runoff

Question

-Consider the global nitrogen cycle depicted in the accompanying figure. How are humans altering this cycle?
A) industrial nitrogen fixation 
B) nitrogen lost to the atmosphere 
C) reduction of nitrogen available to terrestrial ecosystems 
D) reduction of nitrogen fixation by bacteria 
E) permanent burial of nitrogen in coastal environments through runoff

Quizplus · Accepted Answer

Humans alter the nitrogen cycle primarily through industrial nitrogen fixation, which increases the amount of reactive nitrogen in the environment.

-Consider the Global Nitrogen Cycle Depicted in the Accompanying Figure