Describe the trends of population growth of the world from the early period to the present.
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Answer:
Population growth in the world reflects territorial inequalities. Human existence occurred on earth about one million years ago. Since then, the population of the world has been constantly changing. The study of population growth is mainly divided into the following periods. 1. Prehistoric period 2. Ancient period 3. Medieval period 4. Modern era. 1. Prehistoric Period: The beginning of this period is supposed to from food gathering and hunting occupation. Hunting and food gathering were done in Palaeolithic period on land parts. After the lessening of ice on continents, it is imagined that human extension took place in – Africa, Australia, South Europe, south – west and east Asia. Before presence of human in America, 33 lakh people lived on the earth and in course of time after 15 thousand years, increased upto 53 lakhs. It is estimated that the average population density was 0.04 person per square kilometer of the world. 2. Ancient Period: Men started agriculture and cattle rearing on some limited parts of land earlier than before six thousand years ago from today. In this way, human civilization has flourished in many parts of the world, and along with agriculture, city development started. In the beginning of the Christian era, total population of the world is imagined to be 20-30 crores. In this way, in Indian sub-continent east Asia, Greek and Roman empire Mesopotamia and along with Egypt a region of extended group of people including Sindhu – Saraswati civilization were present. 3. Medieval Period: According to history, it is the time period between 700 A.D to 1650 A.D. In 1650 A.D the total population of the world was 55 crores but in after time it got reduced due to obstructions like flood, famine, plague and wars, etc.Read more on Sarthaks.com - https://www.sarthaks.com/730932/explain-the-growth-of-population-in-the-world.
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Population change is governed by the balance between birth rates and death rates. If the birth rate stays the same and the death rate decreases, then population numbers will grow. If the birth rate increases and the death rate stays the same, then population will also grow.