HUMAN POPULATION GROWTH

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Presentation transcript:

HUMAN POPULATION GROWTH pp. 390-392

Exponential model of growth larger it gets the faster it grows primarily density-independent

HISTORY Hunter-gatherer lifestyle 500 kya 10 kya Development of Agriculture: increased and stabilized food supply Population Explosion: decline in death rates

POPULATION GROWTH TODAY Stastistics Growing 1.5% annually 1/3 of world population is malnourished most humans live on 10% of land ½ live within 300 miles of seas and ocean

Key to success Increased carrying capacity of the areas in which we live defeated most limiting factors (i.e. lack of food) Improved healthcare (prenatal and geriatric) Improved sanitation Disease control Education

DEMOGRAPHIC TRANSITION MODEL Economic and social progress affects growth rate Developing country: poorer with fast growing populations (80%) Developed country: modern/industrialized (20%)