3. List several of the natural sources of N, and what is the problem, limitation, these sources had? 1:20 – 2:50 4. What was the effect of Crookes’s research and speech on chemical research? 2:50 – 3:45

5. Why was Haber’s discovery and invention so revolutionary? 3:50 – 4:20

6. What did Carl Bosch do to improve Haber’s discovery, and when and where was the first commercial ammonia plant used? 4:25 – 4:55

7. What impact did the large-scale production of ammonia do for the world’s fertilizer production and resulting food production? 5:00 – 6:20

8. Why can it be argued, claimed, that Fritz Haber’s discovery is possibly “the most important in history”? 6:30 – 7:20

9. What are some of the problems created by our fertilizer use? 7:20 - 8:15

10. How has Haber’s discovery changed the world’s population, and give several statistics (ex. population growth, % of fertilizer, % N in soil, percentage of people that exist because of this discovery, % N in our bodies) 8:30 – 9:10

11. Summarize the critical importance of Haber’s discovery and its future impact on humanity. 9:10 – 9:40