Which Greenhouse Effect and Global Warming term is correctly associated with important distinction or response: “it should not be confused with nitrogen dioxide”, and also with “a long-lived greenhouse gas”?

Correct Answer: Option D — Nitrous oxide. Nitrous oxide is correct because it is it should not be confused with nitrogen dioxide. Nitrous oxide is also associated with a long-lived greenhouse gas. A further identifying fact is that Nitrous oxide is also contributes to stratospheric ozone depletion. Another useful fact is that Nitrous oxide is associated with it should not be confused with nitrogen dioxide. Why the other options are incorrect: Option A — Water vapour: It is warmer air can hold more moisture and is associated with the most abundant natural greenhouse gas. Option B — Tropospheric ozone: It is it should not be confused with protective stratospheric ozone and is associated with a secondary air pollutant and greenhouse gas. Option C — Greenhouse effect: It is human emissions strengthen the natural effect and is associated with a natural atmospheric warming process. Exam Takeaway: Link Nitrous oxide with “it should not be confused with nitrogen dioxide” and “a long-lived greenhouse gas” for quick revision.