The consumption of fossil fuels also increase the amount of nitrogen in the atmosphere. This leads to the smog that we see in urban cities and contribute to Global Warming. Global warming can alter temperature an climates around the world, which can lead to catastrophe. The possible global effects are such exponential increases in the nitrogen level are increasing Global warming and making holes in the ozone layer. We need to take better care of our environment.
Fertilization means adding nutrient to soil.
By adding nitrogen to soil the amount of nitrogen fixed is increased, and diversity of plants will be decreased because there is enough N in soil- nitrogen fixer. Bacteria would not compete, then the plant which is more desirable will grow. This will increase the amount of nitrogen in marine ecosystem and atmosphere. Humans are increasing the nitrogen fixation in our ecosystem by the use of artificially manufactured soil for agriculture which is high in nitrogen. This increase in nitrogen causes an increase in nitrogen fixation by the plants.