Which cycle has been significantly altered by humans?
A) carbon
B) oxygen
C) nutrient
D) nitrogen
E) all of the above

Question

Quizplus · Accepted Answer

All of the cycles listed have been significantly altered by human activities. The carbon cycle has been impacted by the burning of fossil fuels, leading to increased levels of carbon dioxide in the atmosphere. The oxygen cycle is affected indirectly through the alteration of the carbon cycle and deforestation. The nutrient cycle has been altered through the use of fertilizers in agriculture, and the nitrogen cycle has been significantly impacted by industrial processes and agricultural practices that fix atmospheric nitrogen into biologically available forms.

Which Cycle Has Been Significantly Altered by Humans