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The Environment
Chapter 9
Recent History
 In
the past forty years the environment has
become a growing concern
 Not only on a local or regional scale, but on
a global scale
 In 1992 the UN Conference on the
Environment and Development called for
what is in effect now, a new global
environmental order
Developed Vs. Developing
Cleaner air
 Cleaner water
 Declined emission of
CFCs
* Over the past twenty years

CO2 levels increased
greatly
 More landfills and nuclear
waste
 Dirtier streams and rivers
* Also in the past 20 years

Extinction
We can also see extinction
as a function of population
and environment
 While there is more
conservation and policies
geared toward
environmental protection
in developed countries

Extinction cont.
 We
can see that the reason more developed
countries are able to conserve rainforest, which
leads to the conservation of animals is because less
developed countries have to use their forests to
make hardwood products for export, and more
developed countries are able to privatize forests,
which promotes long-term care, rather than shortterm profit.
First Big Conference
 In
Stockholm, 1972 the UN Conference on the
Human Environment was a landmark meeting,
because it preceded the United Nations
Environment Program in 1973.
Greenhouse Effect
 The
Intergovermental Panel on Climate Change
believe that based on current CO2 emissions by the
year 2100 the atmospheric carbon dioxide will rise
to about 500PPMV (parts per million by volume)
 However, they also feel that not expecting an
increase in the emissions of CO2 over the next
century is ludicrous, and according to their
calculations. By the year 2100 atmospheric carbon
dioxide levels will be about 650PPMV
Greenhouse Effect cont.
 If
that calculation is correct there will be a worldwide temperature increase of 2 degrees Celsius and
a half-meter rise in ocean levels
 If over the next century CO2 levels can return to
what they were in 1990 then while global warming
can’t be eliminated it can be minimized.
Conclusion
Greenhouse could lead to spread of disease by insects
moving into higher latitudes, melting of polar ice-caps,
higher global temperatures
 While there are paths to avoiding these futures poor
countries will still depend on exporting their wood to
create industry and using the land to farm to make food
 Ultimately, the future of the environment cannot be
accurately examined without taking into account:
population growth, economics, food, and energy.

Quiz
1.
2.
3.
4.
T F The environment has become concern only on a
national scale
TF The Intergovermental Panel on Climate Change held
a conference in 1992 which created a new global
environmental order
TF Because undeveloped countries have more people
they are working harder to create a cleaner environment
TF Extinction is not only a function of environment, but
populations as well
Quiz cont.
5. Name one reason that developed countries are able to
preserver rainforest with greater success
a. they have more forest
b. there are less people c.
there are more animals d. they do not export
hardwood
6. When was the UN Environmental program founded
______
7. Where was the Un conference on the human environment
held?
Quiz cont.
Using current CO2 emission rates, what will the
atmospheric carbon dioxide level be in 2100?
a. 100
b. 200
c. 300
d. 500
9. According to current calculations how many
degrees will global temperature rise by 2100?
a. 2
b. 4
c. 6
d. 8
10. TF If CO2 emission can be reduced, global
warming can be eliminated.
8.