As of January 2009, the Earth’s population is estimated to be 6.7 billion people
It took all of human history to reach the first billion in
the 1800s, but approximately 200 years to hit six billion.
As the Earth gets more and more crowded, studying population
issues such as the distribution of our natural resources and
our collective impact on the environment will be crucial.
Demography, the study of human populations, is also increasingly
important in both the business and political sectors. Everything
from urban planning to the marketing of a new products uses
This month we explore the field of demography.
Demography (Adobe PDF document)