Question

What role does water vapor play in global warming?

• A. It only cools the atmosphere
• B. It breaks down greenhouse gases
• C. It has no effect on global warming
• D. It is a natural greenhouse gas, and its levels increase with warming

Answer 1

Answer:

D. It is a natural greenhouse gas, and its levels increase with warming

• Water vapor is a natural greenhouse gas, and warming increases evaporation, enhancing its concentration and warming effect.