1. Class 15b: Global climate change

2. Greenhouse effect Natural warming effect

3. What is global warming? Global = worldwide, not universal “Global climate change” more accurate

4. Climate research How do we know about past climates?

5. Is global warming happening?

6. Is global warming unusual?

7. What’s causing global warming?

9. 2.5° - 10°F by 2100; 5.4°F at current emission rates How much more warming?

10. More climatic variability So what for the weather?

11. Northward climate shift of 90-350 miles So what for ecosystems?

12. Thermal expansion of warmer water Melting ice sheets, glaciers So what for the oceans?

14. So what for cities?

15. So what for countries?

16. Mitigation: reduce effects Adaptation: adapt to effects Solutions to global warming

17. Politics of global warming