What is a greenhouse gas? (1 point)
• a gas that forms a physical barrier to block escaping heat
O a gas at higher temperature than the surrounding atmosphere
• any gas in the troposphere that absorbs and re-emits infrared radiation
• any gas in Earth's atmosphere
that contributes to the greenhouse effect
Pick the correct answer
The correct answer is:
• any gas in the troposphere that absorbs and re-emits infrared radiation