Across
- 2. the natural world and the impact of human activity on its condition.
- 3. ocean
- 5. something alive,(animals, plants, people)
- 7. the loose surface material that covers most land.
- 8. something that pollutes
- 9. a mixture of gases that surrounds the Earth
- 10. chemical element in Group 14
Down
- 1. people older, younger, and same age as you
- 4. road building, forestry, and industrial pollution.
- 6. the parts of our planet that are solid