World population is currently 6.5 billion and with 4.4 humans being added per second it will touch 7 billion in six years

Even more striking is that the time required for the global population to grow from 5 billion to 6 billion - just a dozen years - was shorter than the interval between any of the previous billions, it said.
The population on earth today is nearly four times the number in 1900. Behind that phenomenal global increase is a vast gulf in birth and death rates around the world. India’s population stand at 1.1 billion and China is at 1.4 billion. These two countries together make up currently about 35% of the world population. The growth rate in China has stabilized however India continues to expand and still produces a ‘new Australia’ every year.
Source: IANS