Across
- 2. One of the outside layers of Earth that protects us from the sun rays
- 7. Economic factors of supply and demand
- 9. The ratio of deaths in a specific population
- 11. The movement of persons into a new country
- 13. The process of removing salt and minerals from seawater
- 14. The process where people move from rural areas to cities
- 15. Revolution A period of intense agricultural transformation
Down
- 1. The agricultural practice of growing single species
- 3. The natural capability to produce offspring
- 4. genetically modified organism
- 5. A mix of smoke and fog
- 6. Dryland ecosystems turning into desert like conditions by human activities
- 8. A mark or impression left by a foot
- 10. The act of leaving a resident country
- 12. The number of live births per 1,000 people