a cooler climate a warmer climate lower relative humidity more ozone in the atmosphere
I gave my students this multiple choice question: Many scientists think that burning fossil fuels has increased the amount of carbon dioxide in the atmosphere. What effect would the increase of carbon dioxide most likely have on the planet?

Only one answer is correct among these 4 choices:
- a cooler climate
- a warmer climate
- lower relative humidity
- more ozone in the atmosphere

Could you tell me which one is correct?

a warmer climate