Question

12.ਕਿਸ ਸਦੀ ਦੇ ਸ਼ੁਰੂ ਵਿੱਚ ਸੰਸਾਰ ਦੀ ਆਬਾਦੀ ਇੱਕ
ਅਰਬ ਸੀ? At the beginning of which
century the world population was
one billion? ​

Answer 1

Answer:

in 20th century

Explanation:

1. world population milestones went unnoticed until the 20th century since there was no reliable data on global population dynamics .It is estimated that world population of the world reached in the first time in 1804 .