Such authors as P. R Ehrlich and Mike Davis pay a special attantion to the problem of overpopulation and its impact on famine. Researchers state that population growth has a great influence on food shortage. Famine affects countries with the high average population growth rate. They prove the fact that famine affects many countries with high average population growth rate. Countries on African continent belong to less developed countries which resulted in economic and social disasters influenced native population. The statistical date gives the facts that in Africa most people are seriously affected by hunger and different diseases.
In his book F. Osborn examines the general impact of overpopulation on the planet stat. His explains that the environmental toll of population growth and rising affluence seemingly binds humanity in a common fate, but, as the tragedy of the commons suggests, countries do not share the costs and benefits associated with the exploitation equally. Herein lies what many describe as the overpopulation. The symptoms and sources of environmental deterioration are discussed from different perspectives.
For instance, Sudan is one of the countries populations of which died of widespread famine and destitution (Alemu, 1997). The latest US estimate says up to 1.2 million people now face starvation in the south of the country - many more than previously thought. The dramatic increase has prompted the humanitarian aid to call for an unprecedented relief operation to target those most at risk in several areas it describes as famine zones.
The studies examine that the increases in the world's food output were particularly impressive after World War II. In the thirty-five years from 1950 to 1985, world grain harvests increased from less than 750 million tons to 1.7 billion tons. Even though the world experienced unprecedented population growth during this period, the growth in food production was so spectacular that it permitted a 25 percent increase in per-capita food supplies and a corresponding increase in meeting minimum nutritional standards. Primarily, these studies concern European countries and the USA but do not take into account Asian and African countries where population growth has a direct impact on famine.
P. R Ehrlich in the book "The population bomb" explains that; "Our position requires that we take immediate action at home and promote effective action worldwide. We must have population control at home, hopefully through changes in our value system, but by compulsion if voluntary methods fail." (Ehrlich, 1971).
As a result, a secular decline of Europe's population is now in motion: It will take over three thousand years for Italy's population to double, and a German population less than three-fourths its current size is now foreseeable. What these data suggest is that fertility rates vary widely across countries. "In a number of countries, such as Brazil, Egypt, Indonesia, Mexico, and Thailand, fertility rates have been dropping as they did in the 1970s in China and India. At the same time, many developing countries have not entered the demographic transition. For instance, the first warnings that many parts of rebel and government-held southern Sudan were likely to face extreme food shortages came in November 1998. Aid efforts are struggling to reach many areas, despite the use of extra planes. Ehrlich suggests that "the population explosion is an