Soil fertility, and on what does it depend

  1. What is soil fertility, and on what does it depend? 2. What is the Haber-Bosch process, and what are its positive and negative consequences? 3. How has agriculture changed, especially in North America, in the last 150-200 years? 4. What is the Green Revolution, and what are its positive and negative consequences? 5. What is industrial food processing, and how does it differ from artisanal food processing?