Open-Source NetZero Academy

1. Which international scheme requires airlines to offset growth in CO₂ emissions above 2019–2020 levels?

2. ReFuelEU Aviation initiative mandates increasing SAF blending percentages in EU airports, reaching what target by 2050?

3. The US Inflation Reduction Act provides production tax credits for clean fuels under section:

4. What is the goal of ICAO's CORSIA Phase 2 starting in 2027?

5. Which policy provides subsidies for DAC (Direct Air Capture) in SAF production?

6. Which SAF pathway uses hydrogenation of oils and fats and is currently the most mature/commercial?

7. What is the maximum certified blending limit for drop-in SAF in commercial jet fuel today?

8. Which SAF pathway is considered fully synthetic and has the highest potential for scalability with renewable electricity?

9. What feedstock is commonly used in the HEFA pathway for SAF production?

10. Which certification body sets the standards for SAF drop-in compatibility with existing aircraft?

11. For which flight distances are battery-electric aircraft generally considered most viable in the near term (2030-2040)?

12. Current lithium-ion batteries used in aviation demonstrators typically achieve:

13. Which thermal management technique is critical for battery-electric aircraft to prevent overheating?

14. What is the main limitation of battery-electric propulsion for long-haul flights?

15. Emerging battery tech like solid-state could achieve up to what specific energy by 2030?

16. Liquid hydrogen (LH2) has roughly ___ times the gravimetric energy density of Jet A-1 but ___ times lower volumetric density.

17. The primary fuel-cell type used in aviation hydrogen projects is:

18. What is a major challenge for hydrogen storage in aircraft?

19. Hydrogen combustion engines in aviation would produce emissions primarily of:

20. What infrastructure is needed for hydrogen refueling at airports?