Question

humans have had a significant impact on this planet and altered the cycling of the important elements. which cycle has been affected by the combustion of fossil fuels?
carbon cycle
nitrogen cycle
phosphorus cycle
water cycle

Explanation:

Fossil fuels are composed mainly of carbon. When fossil fuels are combusted, carbon is released into the atmosphere as carbon dioxide. This disrupts the natural carbon cycle, which involves the movement of carbon between the atmosphere, biosphere, geosphere, and hydrosphere. The nitrogen cycle involves nitrogen - containing compounds, the phosphorus cycle involves phosphorus, and the water cycle involves water. Combustion of fossil fuels has a more direct impact on the carbon - related processes.

Answer:

carbon cycle