How do fossil fuels play a role in the carbon cycle?
A) Fossil fuels are rich in carbon, and burning them releases carbon into the atmosphere.
B) Fossil fuels require a lot of carbon to burn, which takes carbon out of the atmosphere.
C) Fossil fuels are rich in carbon, and burning them returns carbon to the soil.
D) Fossil fuels require a lot of carbon to burn, which releases carbon into the atmosphere.