Rates of Natural Population Change
Population changes are largely as a result of cultural factors. However, there are some circumstances in which natural changes can have an effect. This is usually on a domestic or local scale but then even still these factors are indirectly linked with cultural factors. These can be things such as:
Disease and Pests: The Aids and Malaria viruses have had a drastic and dramatic effect, particularly in Africa. The former has killed millions on a continental scale whilst the latter has had great effect in particular countries in the Tropical zones. Additionally, pests such as locusts can have great effect on agricultural production and when in conjunction with periods of long drought, famine can arise (in Sahel region 1985).
In the west, cancer is a big killer affecting the natural increase in population. Due to the unhealthy lifestyle and the fatty foods consisting in the western diet, this killer has emerged on the top of the lists.
Natural Hazards: Single natural events such as the flooding in Madagascar (1998) or the Earthquake in Turkey (1997) have accounted for a sharp rise in deaths that have had their effect on the domestic population numbers of the specific countries.
Health and Hygiene: Health and Hygiene is a big big factor into what determines the rates of natural change. If there are poor environmental conditions then this will lead to a high infant mortality rate and a reduced life expectancy or if there are poor environmental conditions but good health services this would lead to a rise in the birth rate. A knew solution has been found to this complex solution whereby in the 1994 Cairo Conference world delegates met and changed their focus from demographic control (reducing population through setting numbers and controlling birth-rate) to education and awareness. It was hoped that if women in developing countries knew of contraception and were educated according to the principles of childbirth and large families the birth rate would be reduced. (International Population Policy)
Agriculture and Development: the more the developed a country or a region is then it is a general rule that the population can be sustained to a greater deal.
All of these factors can be considered influences on the natural changes of population (within a global context).