Density09

A note about India

QuickTimeª and aTIFF (Uncompressed) decompressor

are needed to see this picture.

Where do we go from here?

How high will we go? What will slow us down?

More people, same amount of space

What aspect of population does this affect?

Density has changed

Why don’t people spread out more evenly?

What are some major reasons for this phenomenon?

• Access to water- transportation

• Ports- exchange goods and ideas

• Temperate regions

What are some densely populated areas of the U.S.?

How is population density calculated?

• Density is given in the number of people per square area (miles or kilometers)

• density = people/mi 2

What is the population density of Wyoming? New York?

Population: 506,529Land Area: 97,100 mi2

Population: 19,227,088Land Area: 47,214 mi2

• 506,529 people over 97,100 square miles

• 506,529/97,100

--> 5.21 people/mi2

•19,227,088 people over 47,214 square miles •19,227,088/47,214

--> 407 people/mi2

What are some problems with crowding?

Limiting Factors

• What will limit our growth?

How high will we go? Math Time! If everyone in the world was as densely populated as

NYC- 25,846 people /km2How many people would there be? How much space would each person have?

Land area of earth: 149,000,000 km2

=

Why is this impossible?

Real estimates put the capacity of the earth between 2 billion and 40 billion.

How does population/development affect the environment?

• signs web• Malthus reading (on website)