World's population growing rapidly
Population is growing at an exponential rate - faster and faster
two things which affect population growth:
- Birth rate: number of live babies born per thousand, per year.
- Death rate: number of deaths per thousand of the population per year.
birth rate is higher than death rate = natural increase
death rate is higher than bith rate = natural decrease
Migration - movement of people from one area to another.
five stages of population growth
five different stages of population growth shown by the demographic transition model (DTM).
LEDC's are in the earlier stages
MEDC's countries are in the later stages