Which issue is least likely to have been the result of human impact on the nitrogen cycle?
A) Photochemical smog
B) Global warming
C) Acid rain
D) El Niño-Southern Oscillation events
E) Depletion of the ozone layer

Question

Quizplus · Accepted Answer

El Niño-Southern Oscillation (ENSO) events are natural climate phenomena that involve fluctuating ocean temperatures in the central and eastern Pacific. Unlike the other options, which can be influenced by human activities such as pollution and greenhouse gas emissions, ENSO events are primarily driven by natural climate variability and are not a direct result of human impact on the nitrogen cycle.

Which Issue Is Least Likely to Have Been the Result