Question

What is a greenhouse gas?(1 point)
Responses

a gas that forms a physical barrier to block escaping heat
a gas that forms a physical barrier to block escaping heat

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

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

a gas at higher temperature than the surrounding atmosphere

Answer 1

any gas in Earth's atmosphere that absorbs and emits radiation, contributing to the greenhouse effect