Across
- 4. study of animals
- 5. not fertile
- 7. create or produce
- 9. a person who seeking to protect the environment
- 10. a way of earning enough money to live on
Down
- 1. try to deal with a difficult task
- 2. to a minimum
- 3. the natural environment of an animal or plant
- 6. preservation of natural environment
- 8. derived from living matter