A
Below is a question with multiple-choice answers. Choose the correct option based on your reasoning.

### Question:
The burning of fossil fuels has increased the carbon dioxide content of the atmosphere. What is a possible effect that the increased amount of carbon dioxide is likely to have on our planet?

### Choices:
A. A warmer climate
B. A cooler climate
C. Lower relative humidity
D. More ozone in the atmosphere

### Answer:
