Across
- 2. humans depend on them, because they are the base of food chains
- 5. training and taming wild animals to perform work
- 8. clearing land to make way for more people
- 10. a scientific class of animal or plants
- 11. places where animals live
- 12. a variety or may different kinds of life
- 13. making products in a factory
- 15. having a positive or negative affect on something
- 16. extra, too much, not needed
- 17. a drastic decrease in the population of a species
Down
- 1. using something up
- 2. harmful substances that cause pollution
- 3. resources that regenerate and can be made again
- 4. extracting minerals and rocks from the Earth
- 6. the complete loss of a species
- 7. cut down, pick, gather, collect
- 9. farming
- 14. humans rely on it to breathe