How does nitrogen renter the atmosphere?
Nitrogen enters the atmosphere through a process called nitrogen fixation. This includes both natural and human activities. Natural processes of nitrogen fixation include lightning strikes, which can convert nitrogen gas (N2) into nitrogen oxides (NOx) that can then be deposited into the atmosphere as nitrogen dioxide (NO2).
Additionally, some plants have symbiotic relationships with nitrogen-fixing bacteria that can convert nitrogen gas into a form that plants can use for growth. This process results in the release of some nitrogen back into the atmosphere.
Human activities, such as the use of nitrogen-based fertilizers, also contribute to nitrogen entering the atmosphere. When fertilizers are applied to crops, some of the nitrogen is converted into nitrous oxide (N2O) gas, which can then be released into the atmosphere.
Overall, nitrogen enters the atmosphere through various natural and human activities, and once in the atmosphere, it can contribute to air pollution and climate change.