2. Global Warming By: Connor Paxton Randi Pace & Kate McCulley

3. Questions Is the world getting warmer? Are humans to blame? What can be done about these issues? Are the solutions worth the cost?

4. Sun Earth’s Temperature Solar Energy Solar Energy Solar Energy Solar Energy

5. Sun Earth’s Temperature Solar Energy Solar Energy Radiative Cooling Radiative Cooling

6. Sun Earth’s Temperature Solar Energy Solar Energy Radiative Cooling Radiative Cooling

7. Sun Earth’s Temperature Solar Energy Solar Energy Radiative Cooling Radiative Cooling

8. Greenhouse Effect Sun

9. Runaway Greenhouse Effect If global warming increases enough, earth could one day be like Venus This could result in a surface temperature of 860°F Venus

10. Future Carbon Dioxide Levels Uses of carbon dioxide are likely to double within 150 years:  Increased coal usage  Increased natural gas usage  Decreased petroleum usage These will all occur

11. Rise in Sea Levels? Present sea level rising rate is 1.8 mm/yr If acceleration continues, this could result in 12 in/century sea level rise

12. Consequences of Global Warming

13. Ice Sheets Melting? With the temperature increases, the question is if the ice sheets of Antarctica and Greenland can with stand them.

14. How Much Temperature Increase? Some models propose up to 9°C temperature increase this century Two studies put the minimum at 1.5°C and maximum at 4.5°C or 6.2°C Another study puts the minimum at 2.5°C temperature increase

15. Wildlife Effects Polar Bears  Require pack ice to live  Might eventually go extinct in the wild Sea turtles  Breed on the same islands as their birth  Could go extinct on some islands as beaches are flooded Other species may go extinct as rainfall patterns change throughout the world Polar Bears  Require pack ice to live  Might eventually go extinct in the wild Sea turtles  Breed on the same islands as their birth  Could go extinct on some islands as beaches are flooded Other species may go extinct as rainfall patterns change throughout the world

16. Effect on Humans Fewer deaths from cold, but more from heat waves Ocean Currents get messed up. Rain amount changes such as: Droughts and famine

17. Solutions to Global Warming Conservation including:  Reduce energy needs  Recycling Alternate energy sources such as:  Nuclear energy  Wind energy  Solar energy

18. Conclusions Global warming IS happening Most warming is probably the result of human activities There will be positive and (mostly) negative results from global warming if we don’t work to stop it now.