Across
- 2. relating to the natural world and human activity
- 3. the envelope of glasses surrounding the earth
- 5. concerned with the relation of living organisms
- 7. the impact on the environment of human activity in terms of pollution or damage to natural resources
Down
- 1. all water on earth
- 4. contaminated water, air, or place with harmful or poisonous substances
- 6. the description of a natural occurring phenomena in the world
- 7. a thing that is known or proven true