Question

Write the two cause of human population explosion . Explain with the help of suitable example how this explosion can be checked ?

Answer 1

The two causes of population explosion are:

• • Decline in death rate (including maternal mortality rate and infant mortality rate).
  • Increase in the number of people in the reproducible age.

Following are the ways to check population explosion:

• One-child norm
• Increasing the marriageable age
• Promoting contraceptive methods

Contraceptive methods are of two types:

1. Natural means of contraception
2. Artificial means of contraception

Natural Methods

• Avoiding the coming together of ovum and sperm

  • Periodic abstinence:Avoiding coitus from days 10 to 17 of the menstrual cycle
  • Coitus interruptus: Withdrawal of penis before ejaculation
  • Lactational amenorrhea: It is the absence of menstruation during lactation. So, in the lactation period, the chances of conception are almost zero.

Artificial Methods

• Physically preventing the coming together of ovum and sperm

  • Barriers: Include condoms, diaphragms, cervical caps and vaults
  • Intra uterine devices (IUDs): They release hormones to cause phagocytosis of sperms, or they release copper ions to decrease sperm motility.
  • Oral contraceptive pills: They contain hormones—either progesterone or progesterone−oestrogen combination.
  • Surgical methods: Include vasectomy (removal of a part of the vas deferens in males) and tubectomy (removal of a part of the fallopian tubes in females)