Across
- 3. a roof covered in vegetation
- 5. water that runs into a river or ocean
- 8. something that pollutes
- 9. engineer that deals with protecting the environment from adverse effects
- 10. a person who designs, builds, or maintains engines, machines, or public works
Down
- 1. hard surface that has gaps in it to allow rain to run through it
- 2. the surroundings or conditions in which a person, animal, or plant lives or operates
- 4. to grow or develop in a healthy way
- 6. harmful materials that hurt the environment
- 7. the study of water