Which of the following statements is not a major concern about our altering of the carbon cycle?

• A. The Greenland and Antarctic ice caps are expected to melt if global warming continues.
• B. High-sulphur fuels are used by power plants because they are less expensive than low-sulphur fuels.
• C. The increase in atmospheric \[C{{O}_{2}}\]exceeds the ability of the oceans to absorb the increase.
• D. \[C{{O}_{2}}\]is a gas that traps infrared radiation.