The Main Factors that Influences Population Size in Different Parts of the World. Outline
Introduction
Population size is always changing in the world due to influence from several factors. This paper focuses on the main factors that influence population size in different parts of the world.
Main Body
Fertility
Positive
a) There are currently more births than deaths throughout the world, and more particularly in developing countries that account 97% (Fact Sheet: World Population Trends 2012 by Carl Haub. This result from dual effect of the high birth rate and young population
Negative
Women’s fertility rates have dropped around the world and particularly developing countries due do family planning and more access to contraception.
Mortality
Positive
a) Living longer can cause a region’s population to increase even if birth rates remain constant. In Developed Countries, annual number of births barely exceeds deaths because of low birth rates and much older populations
Negative
High mortality rate than the birth rate influence population negatively. Trend studies point that in developing countries, by 2025, it is likely that deaths will exceed births in the developed countries, the first time this will have happened in history.
Migration
Positive
a) Population has increased due to people migrating into these countries. U.N. Demographers believe that the numbers of people moving to other countries to work and live is rising. The United States adds to global demographic diversity by having by far the largest population in the industrial world (about 303 million)
Negative
High migration instances result in high population in most urban areas and countries. For example, the United States adds to global demographic diversity by having by far the largest population in the industrial world (about 303 million). Higher world population in the decades ahead is cause for concern
Conclusion
To sum up, Population can either increase or decrease as a result of fertility rate, mortality rate, and migration among others. These factors influence populations either positively or negatively. Positively influence result in an increase whereas a negative influence result in a decrease respectively
References
Haub, C. (2012). Fact Sheet: World Population Trends 2012. [online] Prb.org. Available at: http://www.prb.org/Publications/Datasheets/2012/world-population-data-sheet/fact-sheet-world-population.aspx [Accessed 8 Feb. 2015].
Dimick, D. (2014). As World’s Population Booms, Will Its Resources Be Enough for Us?. [online] National Geographic. Available at: http://news.nationalgeographic.com/news/2014/09/140920-population-11billion-demographics-anthropocene/ [Accessed 8 Feb. 2015].
