Question

Greenhouse gases are best described as _______.
a.
the result of fossil fuel use
b.
gases that cause the greenhouse effect
c.
carbon dioxide and methane
d.
gases that trap energy from the sun in Earth’s atmosphere

Answer 1

d. gases that trap energy from the sun in Earth's atmosphere

Explanation: Greenhouse gases (e.g., CO2, CH4, water vapor, N2O) absorb and re‑emit infrared radiation, trapping heat in the atmosphere. (a) is false because many greenhouse gases are natural as well as from fossil fuels. (b) is circular/less precise. (c) lists examples but is not complete.