1. 20-3 Human Population Growth
Explain how the development of agriculture changed the pattern of human growth
Describe the change in human population growth that began around 1650
Describe how growth rates have changed since WWII
Compare the general standard of living in developed countries with developing countries

2. Urban sprawl shows dramatic increases in sprawl especially in the East.
Hydrologic regions in red had at least 50,000 acres converted to 'developed' between 1992 and 1997

5. History of Human Population Growth
500,000 BCE -10,000 BCE Humans were nomads & hunter/gatherers
Roamed around, followed herds, gathered fruit growing naturally
No farms
Agricultural revolution:
Humans start farming
Life was safer
People survived
Population went up
10,000 BCE there
were 2 million people
Allegheny county 3 years ago had a population of around 1,200,000
Map showing where the indian tribes where located

6. Population explosion 1650 CE there is a sharp decline in death rates
Sanitation
More food availabe
Disease controlled
Birth rates stayed high
After WWII technological improvements led more population increase

7. Different colors show different biomes

8. Four stages during which a society becomes modernized and developed.