Question

What is a greenhouse gas?(1 point)
Responses

any gas in Earth's atmosphere
any gas in Earth's atmosphere

any gas in the troposphere that absorbs and re-emits infrared radiation
any gas in the troposphere that absorbs and re-emits infrared radiation

a gas at higher temperature than the surrounding atmosphere
a gas at higher temperature than the surrounding atmosphere

a gas that forms a physical barrier to block escaping heat

Answer 1

a gas that forms a physical barrier to block escaping heat