Across
- 3. immigration-emigration
- 6. red states Republican blue states Democrat
- 8. Thomas Malthus' fear
- 9. people moved to cities
- 13. migrate over short distances
- 15. stopped at the border
- 17. new job in a border town
Down
- 1. point of crisis
- 2. US, Western Europe, Japan, Australia
- 4. increases with education
- 5. stage 5 countries
- 7. lower number means more mechanization
- 10. #people/unit of arable land
- 11. landforms, climate, natural resources, longitude & latitude
- 12. connections
- 14. our grandchildren will enjoy a high standard of living, too
- 16. raw materials