How is population measured? Graphs show increase/decrease in population over time Pyramids show distribution of population by age and sex Factors affecting population change/predictions: War Disease Natural Disasters/Drought Famine Level of Development Wealth/Poverty Education Health Care Cultural Attitudes
Population trends are measured by: Birth and death rates Natural Increase Fertility rates Infant & childhood mortality Life expectancy How useful are these for making predictions?
How has global population distribution changed between 1950 and 2000? What are the predicted changes between 2000 and 2050?
Countries and Areas Ranked by Population: 1950 1 China 562,579,779 2 India 369,880,000 3 United States 152,271,000 4 Russia 101,936,816 5 Japan 83,805,000 6 Indonesia 82,978,392 7 Germany 68,374,572 8 Brazil 53,443,075 9 United Kingdom 50,127,000 10 Italy 47,105,000
Countries and Areas Ranked by Population: 2000 – 1 China 1,268,853,362 2 India 1,004,124,224 3 United States 282,338,631 4 Indonesia 213,829,469 5 Brazil 175,552,771 6 Russia 146,709,971 7 Pakistan 143,958,926 8 Bangladesh 130,406,594 9 Japan 126,729,223 10 Nigeria 114,306,700
Countries and Areas Ranked by Population: 2050 1 India 1,807,878,574 2 China 1,424,161,948 3 United States 420,080,587 4 Nigeria 356,523,597 5 Indonesia 313,020,847 6 Bangladesh 279,955,405 7 Pakistan 277,554,980 8 Brazil 228,426,737 9 Congo 203,039,557 10 Mexico 147,907,650