Preserving Humanity

Preserving Humanity
Although we human beings are, in many respects, the dominant species on the planet, we are also quite a vulnerable one. As of mid-2006, there were over [6.5 billion] people on the planet, a tremendous number given the physical size of individual humans and the resources required to survive and thrive per person.

http://www.prb.org//Content/NavigationMenu/PRB/Journalists/World_Population_Clock/2006_World_Population_Clock.htm