1. NATURAL CAUSES OF CLIMATE CHANGE

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3. VOLCANOES Lava type= Emit CO2; warms- long term (need a lot!)
Ash type= emit SO2- blocks heat- cools- short term

5. Milankovitch cycles Astronomical changes can alter earth’s climate
Tilt and orbit variations

6. Sunspots
More sunspots Cause solar storms
Make earth hotter

7. Impact events
When a space rock hits Earth, how will it change the climate?
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8. The debate
Are humans causing global warming?
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9. The de
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11. The Debate https://youtu.be/TMNtd29OF6A NASA graphs
Debate
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12. Global warming can cause global cooling?

13. Current state of glaciers

14. Glacier national Park, Montana 1938 vs. 2005

15. Alaska 1917 vs. 2005

16. Greenland notice

18. Carbon footprint
Your impact on GHGs.
Extra credit!!