1. Global Warming And the U.S.

2. What is Global Warming? *An increase in the average temperature of the Earth *Recent debate, but has been looked at by scientists for centuries

3. What causes it? *CO2 *methane *nitrous oxide *fluorinated compounds Greenhouse Gases: Human Impacts-

4. What causes it?  Natural Impacts: *Volcanoes *Water vapor *clouds *Change in sun’s energy output

5. Who ’ s Responsible?  Burning of fossil fuels is main cause U.S. is leader in greenhouse gasses Human impacts are changing the composition of the atmosphere

6. What are Causes of Global Warming? Air Pollution What is air pollution? -The presence in the air of substances which pose a potential threat to human health and/or the environment. -The presence of particles in the air which decrease visibility -The U.S. EPA estimates that 50 percent of the U.S. population is exposed to air pollutants exceeding current federal standards.

7. Sources and Types of Air Pollution Energy production from fossil fuels -Carbon dioxide, sulfur oxides, particulates -Increase in greenhouse gases, acidic precipitation

8. Sources and Types of Air Pollution Automobiles, other transportation sources -Carbon dioxide, nitrogen and sulfur oxides, products of incomplete combustion -Increase in greenhouse gases, acidic precipitation

9. Sources and Types of Air Pollution Refrigeration devices including home, commercial, and vehicles -Chlorofluorocarbons -Destruction of the stratospheric ozone layer

11. The Carbon Cycle

12. Effects of Air Pollution and Global Warming - Rising Sea Level -Change of precipitation and local climate conditions; acid rain -Alteration of forests and crop yields - Expansions of deserts into existing rangelands - More intense rainstorms -Not all long-term effects can be determined

13. What Is Being Done: Alternatives http://www.snre.umich.edu/greendana/im ages/solar_array_southfield.jpg http://cs.baylor.edu/~forbes/personal/joshu atree/wind-generators.1.jpg Renewable Energy Sources Solar Energies Wind Power http://www.wrenuk.co.uk/images/biom ass.jpg Biomass http://www.ca.blm.gov/news/images/geothe rmal.gif Geothermal

14. Changes In Vehicle Systems Hybrid Fuel Cell Battery- Electric http://autozine.kyul.net/technical_school/engin e/tech_pic_eng_prius.jpg http://www.redjellyfish.com/newim ages/merlin.jpg http://www.evworld.com/archives/te stdrives/carpicts/ecom_sm.jpg

15. Are These Feasible? © 2002 Organization of the Petroleum Exporting Countries (p296)

16. Comparative Costs of Renewable Energy Technologies

17. Conclusion  Responsibility to improve environmental conditions lies upon all of us as individuals  Concentrate on preventing environmental degradation before it starts  Alternatives ARE feasible and Can be Used