Environmental system

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