Friday, November 11, 2011

Four Stages 
Stage 1: high birth rate, very slow growth, low RNI, In pre industrial society, death rates and birth rates were both high and fluctuated rapidly, according ton natural events, such as drought and disease, to produce, a relatively constant and young population. Children contributed to the economy of the household from an early age by carrying water, firewood and messages, caring for younger siblings, sweeping, washing, preparing food and doing some work in the fields. 
Stage 2: Death rate falls dramatically, birth rate remains high, high RNI. A consequence of the decline in CDR in stage two is an increasingly rapid rise in population growth, (called the population explosion) as the gap between deaths and births grows wider, 
Stage 3: Death rate remains low, birth rate drops; RNI slows. Stage Three moves the population towards stability through a decline in the birth rate.
Stage 4: Death brate low, birth rate low, low RNI (as in stage 1) this occurs where birth and death rates are both low. Therefore, the total population is high and stable

No comments:

Post a Comment