Docstoc

Impact of Humans on Biosphere II.a

Document Sample
Impact of Humans on Biosphere II.a Powered By Docstoc
					Impact of Humans
 on Biosphere II
   Over-Consumption
Who in the world?
   See cartoon!
10% of World’s Population
   Consumes 90% of World’s resources
       Including energy consumption  GHG
       Including raw materials  wastes, dumps
       Including 90% chemical wastes
World Consumption Classes
   Where do we (U.S. society) live?
   Which is healthiest?
World Consumption Classes
   Why do we stay where we are???????
World Consumption Classes
   What if we want to change?

   Should we recycle?
Old “Rs”
   Reduce
   Reuse
   Recycle (last, has role, but consumes fossil
    fuels, pollutes)
Four R’s of Sustainability
   RETHINK!
   Reduce
   Reuse
   Recycle
RETHINK
   Lifestyle
   Not doable in a “top ten list”
   Requires change in values, commitment,
    resolving old problems
   Examples:
               “Rethink”:
          A few starter questions?
   Why do we choose disposable plastic
    (toxic!) when we DINE IN KU?
    Why do we drive when walking or biking
    would only take 10 – 15 minutes?..... And
    then pay to use an exercise facility?
   Why do we use lawn-mowers that hurt our
    grass, our atmosphere and our wallet?
“Rethink”:
 A few starter questions?
   Why do we manufacture containers
    (manufacturing pollutes) and sell essentials
    (water, milk for infants) that we can get for
    free?
   Why do we use light-bulbs which hurt our
    atomosphere and wallets?
REDUCE
   Buy only what you need!
    (less consumption of resources, etc)
   Virtually 100% of what you buy eventually end up in a landfill

    But also, what if all Americans reduced:
   Their personal GHG emissions?
   Their consumption of red meat, beef
   The amount of electricity/gas they used?
   The amount of raw material they consumed?
   The amount of disposables they used?
   Reduction is underappreciated! Ecological actions do not have to
    be “All or nothing!”
REUSE
   Economical $$$$$$$$$ !!!!!!!!!!!!!!!!
   Buy for durability!
   (less consumption of resources, pollution, etc)

   Examples:
    Use washable dishes in KU!, Ask parents for cloth
    napkins,
RECYCLE
   Recycling Aluminum yields best results
    (Mining & extracting pure Al is VERY energy/fossil fuel
    intensive; recycling takes minimal energy)
Finally….
   You know the history of the
    world

   Life began about 3 ½ bya
   Life colonized land ~ ½ bya

   The first humans (Genus
    “Homo”) appeared
    ~ 2 million ya
Finally….
   Our own species, modern H.
    sapiens appeared “only”
    ~100,000 ya

   Life (microbes) produced
    our oxygen atmosphere

   Now once again, life is
    changing the very chemistry
    of our planet
Finally….
   I am writing your final exam,
    but

   YOU are helping to write the
    next chapter of the natural
    history of our planet… by
    how you choose to live!

   Good luck on finals!

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:0
posted:2/23/2013
language:Unknown
pages:19