Why Are Changes in the Global Carbon Cycle Important

question 41

Multiple Choice

Why are changes in the global carbon cycle important?

• A) Carbon is the chief source of food, and burning it reduces available food for primary consumers.
• B) Carbon dioxide is a greenhouse gas, and increasing atmospheric concentrations could alter Earth's climate.
• C) Carbon can be recycled only a limited number of times.
• D) Global carbon availability is directly related to the water cycle.