According to the world population,every ...... person is an Indian.

At present,the total population of the world is about:

The primary cause behind the rapidly growing population of the world in recent times is

Give scientific reasons: Population rise is an unavoidable evil.

At the time of independence,our population was approximately ........... billion,which reached near ............ billion in the year $2000$ and crossed ........... billion in $2011$.

In the world population, how many people are added per year?