Earth Day

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Across
  1. 4. Animals living in their natural environment.
  2. 5. Relating to plants and plant science.
  3. 8. To protect and preserve natural resources.
  4. 10. Not harmful to the environment; sustainable.
  5. 11. Trash or garbage left carelessly in public places.
  6. 13. A person who works to create social or environmental change.
  7. 15. At risk of becoming extinct; nearly gone.
  8. 16. Hazardous materials that pose a danger to health or environment.
  9. 17. The natural home or environment of an organism.
  10. 19. A site where waste is buried underground.
  11. 20. Areas of land saturated with water; marshes or swamps.
Down
  1. 1. The total greenhouse gases produced by human activities.
  2. 2. Dense tropical forest with high rainfall.
  3. 3. Poisonous or harmful to living things.
  4. 6. Energy from the sun used to generate electricity.
  5. 7. The scenery or terrain of a particular area.
  6. 9. A community of organisms and their physical environment.
  7. 12. The surroundings or conditions in which something lives.
  8. 14. Chemical used to kill harmful insects or pests.
  9. 18. Seasonal movement of animals from one place to another.