1. Unit 9 4th semester recycle

2. Unit 9 4th semester plant tree

3. Unit 9 4th semester litter

4. Unit 9 4th semester cloudy

5. Unit 9 4th semester cold

6. Unit 9 4th semester rain

7. Unit 9 4th semester sunny

8. Unit 9 4th semester windy

9. Unit 9 4th semester burn

10. Unit 9 4th semester DepositionEmissions Effects particulates NH 4 Hg NO 3 H SO 4 SO 2 NO 3 NH 3 Al NH 4 Ca NO 3 C SO 4 acid rain

11. Unit 9 4th semester carbon dioxide

12. Unit 9 4th semester fossil fuels

13. Unit 9 4th semester global warmng

14. Unit 9 4th semester Incoming radiation energy Reflected energy Outgoing radiation energy Energy trapped by greenhause gasses greenhouse effect

15. Unit 9 4th semester coal

16. Unit 9 4th semester extinct

17. Unit 9 4th semester flood

18. Unit 9 4th semester forest

19. Unit 9 4th semester News flash! ENDANGERED SPECIES INFORMATION NETWORK Brought to you by the Pacific Bioversity Institute Oregon Idaho Washington species

20. Unit 9 4th semester ice cap

21. Unit 9 4th semester polluted planet