Population

Population refers to the total number of individuals of a species living in a particular geographical area at a specific time. The study of human populations is called demography.

Population Explosion in India

Population explosion refers to the rapid increase in the population of an area. India has experienced a significant population explosion since the mid-20th century.

Reasons for Population Explosion

• High Birth Rate: Due to factors like early marriage, lack of awareness about family planning, and a preference for male children.
• Low Death Rate: Due to advancements in medical science, better sanitation, and control of epidemics, the death rate has declined significantly.
• Poverty and Illiteracy: Lack of education and awareness often leads to larger family sizes.

Key Demographic Terms

• Demography: The statistical study of human populations, including their size, structure, and distribution.
• Population Density: The number of individuals per unit of geographical area (e.g., per square kilometer).

• Birth Rate (Natality): The number of live births per thousand people in a population in a given year.
• Death Rate (Mortality): The number of deaths per thousand people in a population in a given year.
• Growth Rate of Population: The rate at which a population is increasing or decreasing in a given year due to natural increase and net migration.

Problems Due to Population Explosion

• Unemployment: A large population puts pressure on the job market, leading to high rates of unemployment.
• Over-exploitation of Natural Resources: Increased demand for resources like water, food, and energy leads to their depletion and degradation.
• Low Per Capita Income: A large population can lead to a lower per capita income, as the national income is divided among more people.
• Price Rise (Inflation): High demand for goods and services can lead to an increase in their prices.
• Pollution: A larger population generates more waste and pollution, leading to environmental degradation.
• Unequal Distribution of Wealth: Population explosion can exacerbate existing inequalities in the distribution of wealth and resources.

Population Control Measures

Population control is the practice of artificially altering the rate of growth of a human population. In India, the government has implemented various measures to control population growth.

Surgical Methods

Surgical methods of contraception are permanent and highly effective.

• Vasectomy (Male Sterilization):

  • Procedure: A surgical procedure in which the vas deferens (the tubes that carry sperm from the testes) are cut or sealed.
  • Effect: Prevents sperm from being released during ejaculation.
  • Reversibility: Can sometimes be reversed, but the success rate is not guaranteed.

• Tubectomy (Female Sterilization):

  • Procedure: A surgical procedure in which the fallopian tubes (the tubes that carry eggs from the ovaries to the uterus) are blocked or sealed.
  • Effect: Prevents the egg from reaching the uterus and being fertilized.
  • Reversibility: Difficult to reverse.

Non-Surgical (Temporary / Barrier and Chemical) Methods

While surgical methods are permanent, non-surgical methods are temporary, reversible, and used to delay or space pregnancies.

1. Barrier Methods (e.g., Condoms):
   • Description: Thin sheaths made of latex or polyurethane worn over the penis in males during intercourse.
   • Function: Physically blocks the sperm from entering the female reproductive tract (uterus/vagina).
   • Additional Benefit: Also helps protect against Sexually Transmitted Infections (STIs/STDs) like HIV/AIDS.
2. Chemical Methods (e.g., Contraceptive Pills):
   • Description: Oral tablets containing synthetic female hormones (estrogen and progesterone).
   • Function: Inhibits ovulation (release of the egg) by suppressing FSH and LH secretion from the pituitary gland.
3. Mechanical Devices (e.g., Intrauterine Devices - IUDs):
   • Description: Small T-shaped devices (like the Copper-T) inserted into the uterus by a doctor.
   • Function: Prevents implantation of the blastocyst by releasing copper ions or hormones that are spermicidal and alter the uterine lining.

---

Population Education

Population education is an educational program designed to help students understand the nature, causes, and consequences of population growth, and to foster responsible attitudes towards family size and community resources.

---

Check Your Knowledge