1. World Population

2. Population Growth
The current population of the world is just under 7 billion.
Humans only live on 30% of the earth’s land
Global population is projected to reach 9 billion by the year

4. Measuring Population
Death rate – the number of deaths per year for every 1000 people
Birth rate – the number of births per year for every 1000 people
Population growth occurs when the birth rate is higher than the death rate.
Population decline occurs when the death rate is higher than the birth rate
Immigration can also impact population growth

5. Challenges of Population Growth
Keeping up with food production
Shortages of water, housing, and clothing
If the birth rate is high then too much of the population would be young people who cannot contribute to food production
Many scientists believe that even with rapid population growth technology is advancing to be able to keep up with the growing population

6. Negative Population Growth
Recently many countries in Europe have experienced negative population growth (death rate > birth rate)
This also creates problems
Difficult to find workers
Labor must be recruited from other countries which can cause tensions between the newcomers and the European nation

7. Population Distribution
Population distribution – the pattern of human settlement
The population distribution of the world is extremely uneven – humans live in areas where there is water and where the climates are not harsh.
Population density – the average number of people living on a square mile of land
To calculate population density total population of a country and divide by its total land area

8. Let’s find Population Density
Australia
Italy
Shanghai, China
Bangladesh
Mexico
Brazil
Monaco
New York City, NY
Canada
Mongolia
Chicago, IL
China
Russia
Owensboro, KY
Cuba
South Korea
Egypt
Tuvalu
Kentucky
Germany
United Kingdom
Alaska
Iceland
Rhode Island
India
United States
Iraq
Mumbai, India
Israel

11. Population Movement
Migration – the movement of people from place to place
People migrate for many different reasons
Urbanization – the growth in population of urban areas due to migration
About half of the worlds population lives in cities
Refugees – people who are forced to leave their country to escape persecution or disaster.

12. The Miniature Earth Project