What the world is facing is a population explosion. Presently the world has 7.3 billion people by 2098 it will be 11.2 billion people. Majority of the growth in Africa, Muslim world and the sub continent of India. Highest in the world is Nigeria which is 10 children per family compared to Denmark and Japan which is 1.7 children.
This problem needs to be addressed because of the impact on the environment, water supply and  pollution in general.