All of the following human behaviors substantially affect the nitrogen cycle except
A) addition of sewage to aquatic systems.
B) use of nitrogen fertilizers.
C) runoff from feedlots.
D) runoff from salt-treated icy highways.
E) burning of fuels.

Question

Quizplus · Accepted Answer

Runoff from salt-treated icy highways primarily affects the salinity of water systems rather than the nitrogen cycle. The other options involve activities that directly contribute to nitrogen inputs or transformations in the environment.

All of the Following Human Behaviors Substantially Affect the Nitrogen