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

2. Who monitors carbon credit projects for accuracy?

3. When was the EU ETS established?

4. Which household appliance contributes significantly to carbon emissions?

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

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

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

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

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

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

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

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

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

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

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

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

17. Which process removes CO₂ from the atmosphere?

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

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

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

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

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

23. What is the purpose of carbon credits?

24. Which organization monitors compliance with the EU ETS?

25. What percentage of food emissions comes from transportation?

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

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

28. Trees absorb CO₂ through a process called?

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

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

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

32. Which industry sector buys the most carbon credits?

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

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

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

36. The carbon cycle is the process of?

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

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

39. What is the main source of methane emissions?

40. What is Phase 4 of the EU ETS?