Across
- 4. energy heat from within the earth
- 5. effect natural process that occurs when certain gases in the atmospher absbor and reradiate energy from the sun
- 8. brownish haze that hangs in the sky caused by pollution
- 10. resource natural rsource that CANNOT be replaced within a lifetime
- 14. preservation and wise use of natural resource
- 15. warming increase in earth's average temperature
Down
- 1. renewable energy from plants and animals
- 2. resource natural resource that can be replaced within a lifetime
- 3. clearing of forest lands
- 6. unwanted change in the environment
- 7. energy moving heated air used to generate electricity
- 9. recovery of materials fro waste
- 11. energy splitting of atoms to release heat and radiatnt energy
- 12. energy radiant and heat energyt from the sun
- 13. waste thrown away or placed in landfills