It is often said: two gives a company, three makes a crowd. Yes, although humans are social beings and like the company of fellow human beings, still we feel uncomfortable when there are too many people around at any place. Hence, after some time in this congested atmosphere, we look towards vacation at seashores and mountainous places where we expect to be away from the maddening urban crowd.

  But was this world as crowded as we see it now? Let us see. In the year 1800 AD, the world population reached 100 Crore for the first time which doubled in the next 130 years only; i.e., it became 200 Crore by 1930 and increased to 300 Crore in 30 years only; i.e., around 1960 and it became 400 Crore in 15 years only; i.e., around 1974. It became 500 Crore in 12 years only; i.e., around 1987, which became 600 Crore in 12 years only; i.e., around 1999. It became 700 Crore in 15 years only; i.e., around 2014 which is projected to become 800 Crore around 2025; i.e.,....