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  1. 7. the illegal hunting of animals
  2. 9. the continuous absence of rain, thus causing the land to dry up
  3. 10. untamed animals (in their natural habitat)
  4. 12. a group of small islands or an area of sea in which there are many small islands
  5. 13. tips places where unwanted garbage is dumped
  6. 14. a long piece of land that sticks out from a larger area of land into the sea or into a lake
  7. 17. cap a thick layer of ice that permanently covers an area of land
  8. 20. a narrow area of sea that connects two larger areas of sea
  9. 21. warming an increase in the temperature of the Earth's atmosphere, which is due to the greenhouse effect
  10. 23. species a species of plant or animal that are in danger of becoming extinct
  11. 25. a mountain with a large, flat top
  12. 26. a wall built across a river that stops the river's flow and collects the water, especially to make a reservoir that provides water for an area
  1. 1. something that pollute
  2. 2. a large flat area of land that is high above sea level
  3. 3. contamination or toxic bi-products from factories
  4. 4. an area under the earth's surface where there is a large amount of oil; a region rich in petroleum deposits
  5. 5. generally referring in packaging, it means something that can be decomposed by bacteria or other organisms
  6. 6. the process of a liquid heating up and turning into a gas or vapor
  7. 8. fuels fuel formed naturally over many years from the remains of animals, such as coal, oil, and natural gas
  8. 11. an area of water next to the coast, often protected from the sea by a thick wall, where ships and boats can shelter
  9. 15. the natural organisms and flora and fauna that constitute and sustain a particular area
  10. 16. waste matter such as water or human urine or solid waste
  11. 18. the rise and fall of the sea that happens twice every day
  12. 19. chain a series of organisms interrelated in their feeding habits, the smallest being fed upon by a larger one, which in turn feeds a still larger one, etc
  13. 22. something that is dangerous and likely to cause damage
  14. 24. a circular movement in which each circle is above, below, or wider than the one before