Why Are Changes in the Global Carbon Cycle Important

Multiple Choice

Why are changes in the global carbon cycle important?

A) Burning increases available carbon for primary producers and, therefore, primary consumers.
B) Deforestation and suburbanization increase an area's net primary productivity.
C) Increasing atmospheric concentrations of carbon dioxide are altering Earth's climate.
D) By using fossil fuels, we are replenishing a nonrenewable resource.