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(P) Population: A Growing Concern (Factors that influence change (Food…
(P) Population: A Growing Concern
Population Change
Birth Rate
Number Of people born in a year
Death Rate
Number of deaths in a year
Natural Increase
When birth rate is higher then death rate
Natural Decrease
Death rate is higher than birth rate
Changes in Growth
Past
Grew slowly in very underdevloped
Now
Developing
Very Rapid
Developed
Very Slow
Demographic transition Model
Stage One
Very Poor
High birth rate
High death rate
Famines and diseases
May grow very slowly
Stage Two
Economy starts to develop
High birth rates
Better water, food and medical supplies
Death rates fall
Big gap between birth and death rates
Grows quickly
Stage Three
Economy still improving
planning there family size
Birth rates fall
Death rates stay the same
Growth slows down
Stage Four
Economically developed
People live long lives
Have few children
Birth rates low
Death rates low
Increase very slowly
Stage Five
Concerned with material comforts
People have few children
birth rates lower than death rates
Decrease
Factors that influence change
Food Supplies
Developing countries food supplies increase
Become Healther
Live longer
Have more children
Results in growth
Health
Because
better food supplies
Better medicines
Cleaner water
better public health
Results in growth
Improved tecnology
life saving drugs
machines
Improves food suplies
better water tretment
Results in growth
Education
Led to lower birth rates
More working people
Family planing
War
Results in decrease
Deaths to soldiers and civilians
Reduces birth rates
Place of Women in society
Equality
Making there own decisions
Birth rates decreases
Furture
Pessimistic view
Optimistic View