Sagot :
Answer:
Human activities, such as making fertilizers and burning fossil fuels, have significantly altered the amount of fixed nitrogen in the Earth's ecosystems. ... Increases in available nitrogen can alter ecosystems by increasing primary productivity and impacting carbon storage (Galloway et al. 1994).
Explanation:
Answer:
Recently, people have been causing these biogeochemical cycles to change. When we cut down forests, make more factories, and drive more cars that burn fossil fuels, the way that carbon and nitrogen move around the Earth changes. These changes add more greenhouse gases in our atmosphere and this causes climate change.