Presently the world has 7.2 billion people by 2098 (according to the UN projection) the world will have 11.2 billion people on the planet. Majority of the growth in the Muslim world and Africa.
Average family size in Syria and Pakistan is 10. Average family size in Denmark and Japan is 1.8 children.
Highest birthrate in the world is Nigeria which is 12 children per family.
The world has a shortage of fresh water.