Multiple choice Which of the following is/are greenhouse gas(es)? Nitrous Oxide (N2O) Nitrogen (N2) Ozone (O3) Only 1 Both 1 and 2 1, 2 and 3 Both 1 and 3 Reveal answer Fill a bubble to check yourself D Correct answer Explanation Greenhouse gases are those that can absorb and emit infrared radiation, but not radiation in or near the visible spectrum.