Presentation on theme: "According to the UN, world population is expected to grow to 9.2 billion by the year 2050. What challenges do you see if this prediction proves accurate?"— Presentation transcript:
According to the UN, world population is expected to grow to 9.2 billion by the year 2050. What challenges do you see if this prediction proves accurate?
Students should be able to predict future population trends. Students will discuss consequences / challenges based upon future population trends. Students will fully comprehend the 4 phases of the Demographic Transition Model.
World Population Clock World Population Clock 2013 Pop. Map with 2050 projections 2013 Pop. Map with 2050 projections World Population Milestones World Population Milestones Note the time it took to add each additional billion after the first in 1827!
RNI = Rate of Natural increase. It is found by taking the number of births and subtracting the number of deaths (does not account for migration into or out of a country). TFR = Total Fertility Rate. This is a measure of the average # of children a woman will have in her child bearing years. Youthfulness of a population is a measure of the % of the total population that is <15 yrs. Of age…it is vital to maintaining productive stability in a nation.
China1.3 Billion India1.2 B USA313 Million Indonesia246 M Brazil203 M Pakistan187 M Bangladesh159 M Nigeria155 M Russia139 M Japan126 M
India 1.7 Billion China 1.3 B USA 403 Million Nigeria 390 M Indonesia 293 M Pakistan275 M Brazil223 M Bangladesh194 M Philippines155 M Democratic Republic of the Congo149 M
Phase #1 – Pre Industrial High Birth Rates High Death Rates Slow Rate of Natural Increase (RNI) Usually associated with poor public health measures like lack of sanitation. AKA – Less Developed Countries, 3 rd World Countries
Median Age – 18.1 Life expectancy at birth – 38.76 Total fertility Rate – 5.97 children / woman
Phase #2 – Transitional High Birth Rates Death Rates Fall (Higher Life expectancies) Rapid Rise in the RNI Associated with improved economic and social conditions
Median Age – 26.5 years Life expectancy at birth – 67.14 years Total Fertility Rate – 2.58 children per woman
Phase #3 – Transitional Birth Rates Begin to Fall rapidly Death Rates Fall slightly RNI begins to level off In an urbanized and industrial society people begin to see the benefits of smaller families.
Phase #4 – Industrial Low Birth Rates Low Death Rates RNI is relatively flat or even in slight decline Usually associated with highly industrialized and highly urbanized countries.
Median Age – 44.8 Life expectancy at birth – 82.25 Total fertility Rate – 1.21 children / woman
PUSH FORCES: drive people from their homelands. EXAMPLES: civil war or unrest; environmental disasters; unemployment; ? PULL FORCES: things that attract migrant populations to certain locations. EXAMPLES: better economic opportunity; better health services; better educational opportunities; personal & political freedom; ?
Migration of people from rural areas to urban areas. Growth of cities. URBANIZED POPULATION = % of an area’s total population that lives in cities. Currently about 50% of the world’s population lives in urban areas. This number is increasing at a rapid rate throughout the entire world URBAN PRIMACY – a city that is disproportionately large & dominates economic, political & cultural activities.