Towards a sustainable future lecture 2
we no longer live in a sustainable society.
similar to the ancient civilization anasazi who had built an amazing
community which ended up outgrowing itself and the land could no
longer sustain its population. likely due to drought
easter island: (rapa nui) its famous for its 900 statues on the island. when
the europeans arrived there were only 2000-3000 people on the island so
the europeans didnt understand how they could build such great statues.
however it is possible that 15000 people lived there, may have died out
do to not being able to sustain themselves. the highland was once highly
forested. their diet also changed from aquatic life to chickens and fruit
maybe due to lack of recourses. there was a collaps from 15000 to 3000
mayan people also had a collapse, they over populated the land and it
could no longer support the great numbers
are we on our way to collapse?
our world is over populated and we are consuming numerous resources,
and producing waste. similar to the easter island
however we are more sophisticated because we can alter the global
scale biophysical processes (we alter temperatures of environment and
oceans, also introduing new chemicals and creatures from one region to
another "almost like god"
population may hit 9 billion people during our lifetime
typically the temperature of the earth oscillates with ice ages. the
average global temperature is going up over the last 150 years. humans
are responsible for the temperature change over this period
there is very little ozone over Antarctica, it is slowly spreading to the ozone
to south America
alien species are able to be transported throughout the world either on
purpose by humans or with the transport of planes and boats etc.
environment: almost everything. it is especially affected by human
environmentalism: refer to social movement with aims of improving or
protecting aspects of the environmen