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HUMAN IMPACT on the BIOSPHERE
Chapter 6-4
Charting a course for the Future
http://www.claybennett.com/pages2/mistletoe.html
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ENVIRONMENTAL PROBLEMS___________________
___________________
___________________
___________________
___________________
http://www.acmecompany.com/stock_thumbnails/13808.greenhouse_effect_2.jpg
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DEAD ZONES
When an ecosystem receives a LARGE inputof limiting nutrient (ie., fertilizer runoff) thepopulation increases dramatically = ___________
REMEMBER !
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Our atmosphere between
20-50 km contains
high concentrations
of ____________
which protect us from
the sun’s harmful
______________ radiation.
OZONE LAYER
http://pubweb.bnl.gov/users/xujun/www/bnl/ozone_layer_1.gif
http://www.planetguide.net/book/chapter_5/ozone_layer.html
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EFFECTS OF UV RADIATION
Click here to see a movie about the effects of UV radiation
WMV, 618K
__________________________________
________________________ of skin
__________________________________
Reduces ________________
Disrupts __________________ in oceans
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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
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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.
OZONE DEPLETION
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_____________spray cans no longer contain CFC propellants.
Gases in ___________________and _____________ are collected and recycled.
THAT’S WHY . . .http://www.roundrocktexas.gov/images/spray_cans_large.jpg
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Emissions to AtmosphereNitrogen oxidesSulfur dioxide
Chemical TransformationNitric acid
Sulfuric acid
PrecipitationAcid rain, fog,snow, and mist
Dry Fallout
Condensation
particulates, gases
Industry Transportation Ore smelting Power generation
ACID RAIN
What’s the cause?________________________
Releases _______________ and ________________ into the atmosphere that react with water toproduce ACID RAIN.
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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
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HOW DO WE HELP?Develop a National energy policy that emphasizes use of alternative renewable energy sources
Cut down on activities that use fossil fuelsconserve electricitydrive less
Drive automobiles with increased fuel efficiency OR run on alternative fuels
ACID RAIN
Recycle (uses less energy than starting from scratch)
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GREENHOUSE EFFECTTemperatures of Earth remain within a range
______________ because the _____________
acts as a natural _________________ blanket.
http://wwwstatic.bayareawritingproject.org/images/bawp41/earthAtmosphereIMG.gif
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GREENHOUSE EFFECTAtmospheric gases such as
___________________
___________________
___________________
___________________
NORMALLY trap heat
energy from the sun
like a greenhouse
= _____________________http://www.acmecompany.com/stock_thumbnails/13808.greenhouse_effect_2.jpg
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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)
GLOBAL WARMING
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What’s so bad about warming up a little?
___________ __________
Cartoon from Brookings Register
http://healthandenergy.com/images/global2.gif
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What’s so bad about warming up a little?
http://zfacts.com/metaPage/lib/Atlantic_conveyor.jpg
Changes in ____ _______
http://www.claybennett.com/pages/ocean_temps.html
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What’s so bad about warming up a little?
____________________http://i.a.cnn.net/cnn/2005/WEATHER/08/25/tropical.storm/story.katrina.915p.jpg
http://en.wikipedia.org/wiki/Hurricane_Katrina
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What’s so bad about warming up a little?
________________
Brookings Register
http://www.cactus-art.biz/note-book/Dictionary/aaa_Dictionary_pictures/drought.jpg
______________ and __________
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What’s so bad about warming up a little?
Changing _______ meansloss of _________
http://www.metro.co.uk/news/article.html?in_article_id=35720&in_page_id=34
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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 _____________.
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HOW DO WE HELP?
Cut down on _________ emissions (with or without the Kyoto accord)
Develop a National energy policy that emphasizes use of alternative renewable energy sources
Cut down on activities that use _______________
Drive automobiles with increased fuel efficiency OR run on alternative fuels
GLOBAL WARMING
_______________ (uses less energy than starting from scratch)Reduce ___________________ (plants use CO2)
Watch your ___________ footprint
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We Can’t Just Keep Piling it up in Landfills
We have to:
_____________
_____________
_____________
Plastic recycling video