The Eight Billion Mark And Beyond

The world population hit the eight billion mark on November 15, which is both a milestone and a challenge. It took 11 years for the world to get an additional one billion population. The world population was seven billion in 2011. The history of world population shows that the world population was five million in 8,000 BC, when agriculture emerged. The population grew to 200 million in 1 AD with a growth rate of 0.05 per cent. (Some say the figure was 300 million or even 600 million.)