Question 4 Q: 4 What do the letters ‘GHG’ stand for? Options A: Global Health Gauge B: Green Hazard Gauge C: Governmental Health Gauge D: Greenhouse Gas Save Question Show Answer Discussion 0 Clear Discussion Most voted Newest No comments yet. Be the first to comment. Post Be respectful. No spam. Correct Answer: D Explanation GHG is an abbreviation for 'greenhouse gas'.Greenhouse gases create a 'greenhouse effect' on the planet- ie warming it.Other question on the subject of GHG appear in these tests.