HUMAN IMPACT on the BIOSPHERE

Chapter 6-4

Charting a course for the Future

http://www.claybennett.com/pages2/mistletoe.html

ENVIRONMENTAL PROBLEMS___________________

___________________

___________________

___________________

___________________

http://www.acmecompany.com/stock_thumbnails/13808.greenhouse_effect_2.jpg

DEAD ZONES

When an ecosystem receives a LARGE inputof limiting nutrient (ie., fertilizer runoff) thepopulation increases dramatically = ___________

REMEMBER !

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

EFFECTS OF UV RADIATION

Click here to see a movie about the effects of UV radiation

WMV, 618K

__________________________________

________________________ of skin

__________________________________

Reduces ________________

Disrupts __________________ in oceans

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

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

_____________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

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.

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

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)

GREENHOUSE EFFECTTemperatures of Earth remain within a range

______________ because the _____________

acts as a natural _________________ blanket.

http://wwwstatic.bayareawritingproject.org/images/bawp41/earthAtmosphereIMG.gif

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

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

What’s so bad about warming up a little?

___________ __________

Cartoon from Brookings Register

http://healthandenergy.com/images/global2.gif

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

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

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 __________

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

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 _____________.

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

We Can’t Just Keep Piling it up in Landfills

We have to:

_____________

_____________

_____________

Plastic recycling video