1/1 - eCommons@Cornell - Cornell University
1/1 - eCommons@Cornell - Cornell University
1/1 - eCommons@Cornell - Cornell University
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'Way Too Many of Us<br />
Abstract:<br />
Time<br />
RESEARCH<br />
The Earth's limited supply of natural resources will only be<br />
able to sustain 2 billion humans by 2100, bad news for a<br />
world that feeds 5.6 billion. The optimum human population,<br />
or carrying capacity, for the U.S. is projected to be<br />
200 million, 60 million fewer than the current population.<br />
Disappearing stocks of fertile land, fresh water, fossil fuel<br />
energy, and helpful biota will control human population the<br />
old-fashioned way—through starvation and disease—if we<br />
cannot reduce our numbers voluntarily.<br />
The Earth and its resources may<br />
be too small for all of us to<br />
share. Even if we learn how to<br />
make the most of a limited<br />
supply of land, energy, water<br />
and biota, <strong>Cornell</strong> ecologists have<br />
calculated that by the year 2100, the<br />
planet will be able to provide for only<br />
2 billion humans—almost 4 billion<br />
less than today's world population—<br />
with a modest but comfortable standard<br />
of living. Only 200 million humans<br />
can be sustained by the natural<br />
resources of the United States,<br />
making the current population 23<br />
percent over eco-budget.<br />
"If we refuse to reduce our numbers<br />
ourselves," warns David Pim-<br />
JUNE 1994<br />
17<br />
entel, PhD '51, professor of entomology<br />
and agricultural sciences, "nature<br />
will find much less pleasant ways<br />
to control human population: malnourishment,<br />
starvation, disease,<br />
stress and violence." The choice is<br />
simple, says Pimentel—total reproductive<br />
freedom now, or freedom from<br />
suffering in the not-so-distant future.<br />
<strong>Cornell</strong> researchers presented<br />
their findings at the annual meeting<br />
of the American Association for the<br />
Advancement of Science in San Francisco.<br />
Their results were published<br />
in the May issue of Population and<br />
Environment, Joining Pimentel as coauthors<br />
were Marcia Pimentel '45,<br />
MS '50, retired senior lecturer in the<br />
Division of Nutritional Sciences, and<br />
undergraduates Rebecca Harman<br />
'92, Matthew Pacenza '93 and Jason<br />
Pecarsky '93.<br />
Optimum world population: 2<br />
billion. Optimum U.S. population:<br />
200 million. Ecologists call these<br />
magic numbers "carrying capacities."<br />
An area's carrying capacity (or<br />
"K") is the number of individuals of