vocabulary exercise

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Across
  1. 2. a period of dryness
  2. 4. illegal hunting
  3. 7. any kind of weather condition where something's falling from the sky
  4. 8. more frequent wildfires are an effect of _ change
  5. 9. the destruction of forests
  6. 10. the process of becoming desert
  7. 13. carnivores are at the top of the _
  8. 14. the community of interacting organisms and their physical environment
  9. 15. Tens of thousands of elephants are being killed every year for their _ tusks
Down
  1. 1. an animal under the threat of becoming extinct is _
  2. 3. biological variety in an environment
  3. 5. the practice of, e.g., producing crops
  4. 6. symbiosis is a mutual _ of two species
  5. 8. a tragic event
  6. 11. A glacier's gradual movement causes _
  7. 12. Volkswagen exhaust _ scandal began in 2015