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

2. Trees absorb CO₂ through a process called?

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

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

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

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

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

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

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

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

11. What percentage of food emissions comes from transportation?

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

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

14. Which industry sector buys the most carbon credits?

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

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

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

18. Who monitors carbon credit projects for accuracy?

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

20. When was the EU ETS established?

21. Which organization monitors compliance with the EU ETS?

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

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

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

25. What is the purpose of carbon credits?

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

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

28. What is the main source of methane emissions?

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

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

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

32. Which process removes CO₂ from the atmosphere?

33. What is Phase 4 of the EU ETS?

34. The carbon cycle is the process of?

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

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

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

38. Which household appliance contributes significantly to carbon emissions?

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

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