HUMAN IMPACT on the BIOSPHERE Chapter 6-4 Charting a course for the Future

1. HUMAN IMPACT on the BIOSPHEREChapter 6-4Charting a course for the Future http://www.claybennett.com/pages2/mistletoe.html

2. ENVIRONMENTAL PROBLEMS ___________________ ___________________ ___________________ ___________________ ___________________ http://www.acmecompany.com/stock_thumbnails/13808.greenhouse_effect_2.jpg

3. DEAD ZONES REMEMBER ! When an ecosystem receives a LARGE input of limiting nutrient (ie., fertilizer runoff) the population increases dramatically = ___________

4. http://www.planetguide.net/book/chapter_5/ozone_layer.html OZONE LAYER Our atmosphere between 20-50 km contains high concentrations of ____________ which protect us from the sun’s harmful ______________ radiation. http://pubweb.bnl.gov/users/xujun/www/bnl/ozone_layer_1.gif

5. EFFECTS OF UV RADIATION __________________________________ ________________________ of skin __________________________________ Reduces ________________ Disrupts __________________ in oceans Click here to see a movie about the effects of UV radiation WMV, 618K

6. What’s the cause of Ozone Depletion? Chlorofluorocarbon molecules _______ released from air conditioners, aerosol spray cans, fire extinguishers, and industry ________________ http://www.atm.ch.cam.ac.uk/tour/part3.html

7. OZONE DEPLETION HOW DO WE HELP? 1987- the _______________________ committed signing nations (including USA) to a ____________ in the use of CFCs and other ozone-depleting substances. CFC production was _________ after 1995 in the developed countries, and later in developing countries. Today, over 180 countries have ratified the treaty.

8. THAT’S WHY . . . http://www.roundrocktexas.gov/images/spray_cans_large.jpg _____________spray cans no longer contain CFC propellants. Gases in ___________________ and _____________ are collected and recycled.

9. ACID RAIN What’s the cause?________________________ Chemical Transformation Nitric acid Sulfuric acid Condensation Emissions to Atmosphere Nitrogen oxides Sulfur dioxide Dry Fallout Precipitation Acid rain, fog, snow, and mist particulates, gases Industry Transportation Ore smelting Power generation Releases _______________ and ________________ into the atmosphere that react with water toproduce ACID RAIN.

10. ACID RAIN EFFECTS • damages buildings and statues • damages forests • kills fish • reduces biodiversity • causes illness & premature death from heart & lung disorders like asthma and bronchitis

11. ACID RAIN Develop a National energy policy that emphasizes use of alternative renewable energy sources HOW DO WE HELP? Cut down on activities that use fossil fuels conserve electricity drive less Drive automobiles with increased fuel efficiency OR run on alternative fuels Recycle (uses less energy than starting from scratch)

12. GREENHOUSE EFFECT Temperatures of Earth remain within a range ______________ because the _____________ acts as a natural _________________ blanket. http://wwwstatic.bayareawritingproject.org/images/bawp41/earthAtmosphereIMG.gif

13. GREENHOUSE EFFECT Atmospheric gases such as ___________________ ___________________ ___________________ ___________________ NORMALLY trap heat energy from the sun like a greenhouse = _____________________ http://www.acmecompany.com/stock_thumbnails/13808.greenhouse_effect_2.jpg

14. GLOBAL WARMING WHAT’S the CAUSE? • _________________ solid waste, ________ ________ (oil, natural gas, and coal), wood and wood products • Production and transport of fossil fuels • __________________ of organic wastes in landfills • Animal sources (_______________) • ________________________(trees ________________ CO2 from atmosphere)

15. What’s so bad about warming up a little? http://healthandenergy.com/images/global2.gif Cartoon from Brookings Register ___________ __________

16. http://www.claybennett.com/pages/ocean_temps.html What’s so bad about warming up a little? Changes in ____ _______ http://zfacts.com/metaPage/lib/Atlantic_conveyor.jpg

17. What’s so bad about warming up a little? http://en.wikipedia.org/wiki/Hurricane_Katrina ____________________ http://i.a.cnn.net/cnn/2005/WEATHER/08/25/tropical.storm/story.katrina.915p.jpg

18. What’s so bad about warming up a little? ________ ________ http://www.cactus-art.biz/note-book/Dictionary/aaa_Dictionary_pictures/drought.jpg ______________ and __________ Brookings Register

19. What’s so bad about warming up a little? http://www.metro.co.uk/news/article.html?in_article_id=35720&in_page_id=34 Changing _______ means loss of _________

20. What’s the Kyoto Accord got to do with it? The Kyoto Accord is an agreement, aimed at reducing global warming that asks participants to __________ their ________________ emissions to a percentage of their 1990 emission levels _____________.

21. GLOBAL WARMING Develop a National energy policy that emphasizes use of alternative renewable energy sources HOW DO WE HELP? Watch your ___________ footprint Cut down on activities that use _______________ Drive automobiles with increased fuel efficiency OR run on alternative fuels Cut down on _________emissions (with or without the Kyoto accord) _______________ (uses less energy than starting from scratch) Reduce ___________________ (plants use CO2)

22. We Can’t Just Keep Piling it up in Landfills We have to: _____________ _____________ _____________ Plastic recycling video