What does an increase in nitrogen in the atmosphere mean?

Answer 1

It depends. There could be a factory in the vicinity that is pumping nitrogen into the air because of the chemical processes involved. There could even have been an explosion somewhere near increasing the level of nitrogen in the atmosphere. But nitrogen is, of course, also an intrinsic element in the socalled nitrogen cycle in nature, and any inbalance in this regard -- the freeing of more or less nitrogen than could be considered "normal" from its fixations in the soil or elsewhere -- could be a clear sign that something is wrong with the environment.

Answer 2

An increase in nitrogen in the atmosphere can result from human activities like burning fossil fuels and agriculture. This excess nitrogen can contribute to air pollution, smog formation, and ecosystem disruption through processes like eutrophication, where excessive nitrogen in water bodies can lead to algal blooms and negatively impact aquatic life.