Across
- 1. pollution with no specific point of origin
- 9. careful use of resources
- 10. forms when heat/pressure transform plant material
- 13. collecting items for reuse
- 18. rock containing kerogen.
- 19. takes millions of years to form & accumulate
- 20. hydrocarbon used as an energy source
Down
- 2. energy formed by fission
- 3. deposit formed when minerals settle quickly from moving water.
- 4. uses underground steam & hot water
- 5. source of pollution from a known location
- 6. resource that can be replenished in months, years, or decades
- 7. liquid that forms from remains of plants & animals.
- 8. forms from remains of plants & animals.
- 11. uses ocean tides to create power
- 12. energy that uses water to drive turbines
- 14. form thick tar called bitumen.
- 15. could meet 5-10% of U.S. energy needs
- 16. Earth's most abundant energy resource
- 17. best known placer deposit