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power. World Population Bomb
1830 - 1930 doubled from
1-2 billion people
nearly doubled again by
by 2006 ~ 6.3 billion
In 2010 ~ 7 billion
By 2050 ~ 9.5 billion
by 2100 ~12 billion
resources can’t keep
pace with population. Population Concerns
The U.S. Census Bureau estimates that by 2050, no. of
people on Earth ≈ 9.5 billion, or ~ 40% greater than it
was in 2010. Figure 1-4 Human Population Blasts Off Global Resource Consumption Variation Figure 1-6 Worldly Goods: The possessions of a family in
rural India (a) and suburban England (b). Families around the
world vary tremendously in the quantity of resources they use.
Hence, population alone is not a complete indicator of
humankind’s environmental impact. Energy - an Important Resource
Average citizen of U.S. uses
20x as much energy in a
year as a citizen of Ghana,
and 46x as much energy as
a citizen of Bangladesh.
Even as growth rate of the
human population slows
(but number still increases),
including energy, will
become an ever more
significant aspect of human
environmental impact. Figure 1-7 Relative Energy
Consumption per Person for Selected
Critical concept in environmental studies and
one that we will use as a measure throughout
Living with Earth.
Capable of being continued with minimal longterm effect on the environment. Figure 1-3 Many Natural
Resources Can Be Sustained
On farms like this experimental
agricultural station in Peru,
methods are carefully chosen
to help maintain soil quality. 1Sustainability: “meeting the needs of
the present without compromising the
ability of future generations to meet their
1http://www.epa.gov/sustainability Problems with Sustainability
Living resources such as forests, fish, and
soils are being used faster than they can
be naturally replenished.
Minerals, oil and ground water are being
extracted without concerns for their limits
or need to recycle. How to Achieve Sustainability
in the Future
Human population is using land, depleting resources,
and lowering environmental quality a...
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This note was uploaded on 04/02/2013 for the course 460 202 taught by Professor Sugarplum during the Fall '13 term at Rutgers.
- Fall '13