Demographic Transition

Notes:

- Demographic Transition: the transition from high birth and death rates to lower birth and death rates as a country or region develops from a pre-industrialized economic system. Most developed countries are in the process of this transition. The major (relative) exceptions are some poor countries, mainly in sub-Saharan Africa and some Middle Eastern countries, which are poor or affected by government policy or civil strife, notably, Pakistan, Palestine territories, Yemen, and Afghanistan. The model will track population changes that occur as a country begins to develop or industrialize.

- The model works from pre-industrial in stage 1, through development in stages 2 and 3, to post industrial stage 4. It allows us to compare where countries currently are in the transition to countries that have already gone through those changes which effectively can tell us what needs to change.

- Some cities in China are so polluted that the air is hard to breathe and there are like no birds or insects.