1. Sharing
the Biosphere

2. Sustainability
Concept of living in a way that meets our needs without compromising the health of future generations or the health of the planet.
What is the sustainability of Earth? What does our population boom look like?

3. Life History/Cyclic Patterns

4. Population Histograms
Population pyramids or Histograms are bar graphs that show the age and gender composition of a population.

5. The population for Nigeria
A growing Population since there are many young people in its population relative to adults

6. The population for the US
A stable population since the 20 to 40 year-old groups are just replacing themselves

7. The population of Italy
Italy's population pyramid shows a country that will begin to see a decline.
Few children compared to the number of people in their reproductive years.