Across
- 4. uncontrollable flames over a very large area
- 7. (2 words) human-made buildings, usually houses, being built in nature
- 9. chemicals coming from human activities harming nature
- 11. (2 words) a group of foreign animals that damage the local ecosystem
- 12. something that hunts other animals, usually for food
Down
- 1. illegal hunting of animals
- 2. cutting down trees on a very large scale
- 3. too many sea animals being caught
- 5. sickness
- 6. (2 words) long-term increase or decrease in global temperature
- 8. (2 words) animals losing their homes
- 10. (2 words) fuel used for ships, cars etc. leaking out into nature