Environmental system
Across
- 2. Gandhi
- 5. David. "Walden" Civil disobedience"
- 7. Lopaldo
- 8. Hardin
- 10. Darwin. Evolution Homosapiens
- 12. perkins. America's first environmentalist
- 14. Ehrlich
- 15. Muir
- 18. Jenner. Viruela Inmunity
- 19. malthus. Demographer
Down
- 1. Yunus
- 3. Roosevelt
- 4. Maathai
- 6. Boserup
- 9. Carson
- 11. Gore
- 13. Waldo. New think2ing transcendentalist
- 15. Lovelock
- 16. snow. Bomb Cholera
- 17. Peace