SAVE THE EARTH

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Across
  1. 3. The scientific study of organisms and environment
  2. 5. Keeping the nature clean,the wise use of environment
  3. 6. Making air, water, land a dangerous place
  4. 8. Destroying everything around you
Down
  1. 1. Evergreen woodlands, where there is much rain
  2. 2. Too many people in one place
  3. 4. All around us
  4. 7. The natural home of animals and plants