This Is Why the Population Keeps on Rising

Population growth is an increase in the number of individuals in a population. Many nations with Rapid Population growth have low standards of living, whereas many nations with low rates of population growth have high standards of living.

Populations are groups of organisms of the same species living in the same district at the same time. Population size: the number of individuals in the population.

Why do we study Population Growth?

Population ecology is the study of how populations- of plants, animals, and other organisms- change over time and space interchange with their environment. Reasons for the expected population growth include increase in the number of young unmarried mothers, high fertility rates for some ethnic groups, and inadequate sequel education and birth control provision. This rapid growth increase was mainly caused by a decreasing death rate(more rapidly than birth rate), and particularly an increase in average human age.

What about Human Population Growth?

One of the most demanding applications of population growth research is to forecast human population growth. The human population surpassed six billion people in 1999, and is expected to reach nine billion before 2050. It is somewhat surprising to realize that it took all of human history for the human population to reach one billion people.

What are the Components of Population Change?

So, basically the major components of the population change are Birth Rate, Death Rate and Migration.

Birth rate is the number of people born in a population during a given amount of your time . Human birth rate is stated because the number of people born per annum per 1000 within the population. For example, if 35 births occur per year per 1000 individuals, the birth rate is 35. Often this rate is expressed as a percentage, in this case 3.5 per 100, or 3.5%. 

Populations can be subdivided into juveniles (before puberty), reproductive adults, and post reproductive adults (those too old to have offspring). The younger a population, the faster that population grows because the birth rate is higher and therefore the death rate is lower. When the birth rate is expressed per age bracket , it's called the standardized birth rate, as against the crude birth rate of the entire population.

Mortality, in demographic usage, the frequency of death during a population. In general, the danger of death at any given age is a smaller amount for females than for males, except during the childbearing years (in economically developed societies females have a lower mortality even during those years).

The risk of death for both sexes is high immediately after birth, diminishing during childhood and reaching a minimum at 10 to 12 years of age. The risk then rises again, until at late ages it surpasses that of the primary year of life. The expectation of life at birth is that the most effective index of the overall level of mortality of a population

Migration is referred to as the movement of the people from one place to another. The reason for going to one place from another is to be the intention of setting, temporarily or permanently at a new place or location. Migration can be internal or external. 

Internal migration stands for when an individual, family, or a group of people move within the country, this type of migration doesn’t affect the population growth of a country but might change the population growth of the area they migrate to.

There is also an increase in the population when the net migration is more I.e. when more people are moving in a country more than the number of the people that are moving out. Migration plays a very important role in changing the composition of the population in a country.


It is not possible to derive the irrefutable conclusions about the components of demographic change from an analysis of the data for any one country. Rapid population growth is detrimental to achieving economic and social progress and to the sustainable management of the natural resources.

Written By - Akshita Sharma

Edited By - Vanshu Verma

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