1. Which sector releases the most CO₂ when fossil fuels are burned?

2. How much CO₂ does a gallon of gasoline emit when burned?

3. Which country recently linked its emissions trading system to the EU ETS?

4. What is the average CO₂ equivalent emitted per mile by a domestic commercial flight?

5. What gas is primarily responsible for the greenhouse effect?

6. Which greenhouse gas has the highest global warming potential (GWP)?

7. What percentage of EU emissions are covered by the EU ETS?

8. Which type of project is common in carbon offset programs?

9. Which greenhouse gas is primarily emitted from rice paddies?

10. What mechanism does the EU ETS use to allocate emission allowances?

11. What does "banking" refer to in the context of the EU ETS?

12. Which household appliance contributes significantly to carbon emissions?

13. What is the estimated carbon footprint of an average U.S. household?

14. Who are the main buyers in voluntary carbon markets?

15. Which organization monitors compliance with the EU ETS?

16. Which greenhouse gas is NOT regulated by the EU ETS?

17. Switching from a beef-based meal to a vegetarian one once a week can save CO₂ equivalent to driving how many miles?

18. What is the main greenhouse gas emitted from landfills?

19. What is Phase 4 of the EU ETS?

20. Which industry sector buys the most carbon credits?

21. What is the main source of methane emissions?

22. What sector is NOT currently included in the EU ETS?

23. How much CO₂ does the average car emit per mile driven?

24. Trees absorb CO₂ through a process called?

25. Carbon footprint measures the amount of CO₂ generated by?

26. Which process removes CO₂ from the atmosphere?

27. What percentage of food emissions comes from transportation?

28. Which diet change could lower your carbon footprint significantly?

29. What is the primary goal of a carbon offset project?

30. The carbon cycle is the process of?

31. Who monitors carbon credit projects for accuracy?

32. Which gas has the highest global warming potential (GWP)?

33. Which of these dietary choices has the lowest carbon footprint?

34. Which type of entity can create a carbon offset project?

35. How often are emission allowances reviewed under the EU ETS?

36. What percentage of a typical U.S. household's carbon footprint comes from food?

37. Which country is currently the largest emitter of CO₂?

38. What is a cap-and-trade system?

39. What is the purpose of carbon credits?

40. When was the EU ETS established?