The world population is estimated as between one and ten million people,[2] most of whom were hunter-gatherer communities scattered over all continents except Antarctica and Zealandia.
When oil first began to be used for industrial purposes, world population stood at 1.5 billion and sailing ships still plied the waters alongside coal steamers.
The world population has grown by about four billion since the beginning of the Green Revolution and many believe that, without the Revolution, there would have been greater famine and malnutrition.
There should be enormous bloodshed all over the world and the loss of life through various causes shall be so great that the world population shall be considerably reduced.
Cultivatable land barely increases anywhere in the world, the climate change continues to develop, and conversion of food for energy use is increasing; nevertheless, the world population is continuing its growth.
Now, the world's population has risen to a little more than 6.8 billion people, and it is said that the number of people who enjoy the same level of life as we do has increased to approximately 2 billion people.
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