The polar ice caps will melt. Volcanoes will erupt more often. The number of earthquakes will decrease. Rainforests will be unable to support animal life.
I gave my students this multiple choice question: As the amount of carbon dioxide in the atmosphere increases, which occurrence is most likely a long-term result?

Only one answer is correct among these 4 choices:
- The polar ice caps will melt.
- Volcanoes will erupt more often.
- The number of earthquakes will decrease.
- Rainforests will be unable to support animal life.

Could you tell me which one is correct?

The polar ice caps will melt.