Environment

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Across
  1. 2. the relationships between the air, land, water, animals, plants, etc
  2. 4. small pieces of rubbish that have been left lying on the ground in public places
  3. 5. a distinct ecosystem that is flooded by water
  4. 8. what humans need to breathe to survive
  5. 10. afforestation
  6. 12. extended period of no water
  7. 13. a very large sea
  8. 14. forests characterized by high and continuous rainfall
  9. 15. the process by which green plants and certain other organisms transform light energy into chemical energy
Down
  1. 1. someone who wants to protect the environment
  2. 3. the introduction of contaminants into the natural environment that cause adverse change
  3. 6. all the animals, plants, and other things in the world that are not made by people
  4. 7. a mixture of organic matter, minerals, gases, liquids, and organisms that together support life
  5. 9. a layer of gases surrounding the planet Earth
  6. 11. a large landform that rises above the surrounding land in a limited area, usually in the form of a peak