However richer, more developed, countries -like Japan- are able to benefit from a population explosion, as they're able to employ a large number of people.

Population has become a problem due to several factors, including: increased birth rate, decreased infant mortality rate, increased life expectancy, and more immigration.

While these causes have been able to benefit the richer countries, like Japan, the effects on poorer countries are more negative. 

For exapmle, in india population explosion has caused overpopulation, unemployment, this leads to poverty. Another effect is poor health, due to a large sum of people not being able to afford health care, and a quick spread of disease. Finally population explosion also results in pollution and global warming, as there is a higher demand products.

To control these causes governments had implemented ‘The Family Planning’ programme, in 1952, with the goal of more people having planned families. This was mainly achieved through media, where people were reminded of the benefits of having small families with healthy children. This worked well with more educated parents, however others refused the mere thought of it. Another way the state governments tried to persuade people, and control population sizes, was by distributing cheap contraceptives, teaching sex education and legalizing abortion.

However it is evident that more needs to be done, as the population of India may soon reach 150 billion, it can only really be solved through educating people, and making them aware.