Across
- 1. when walls and ceilings are not secured
- 3. used for heating homes
- 5. creates pollutants when burned
- 6. spills cause environmental disasters
- 7. most dangerous job in energy field
- 9. used from remains of years ago
Down
- 2. taking from
- 4. large mining equipment
- 8. very small amounts create a lot
- 10. naturally occurring materials