Population and sustainable development: Basic problem and dilemma

The basic problem to population and sustainable development is that people from non-developed countries like Tanzania, have the strong believe that the amount of children that they have would be the assurance for their long term sustainability, meaning that as more children they have more provisions they will have.
On the other hand, the basic dilemma to that problem is how to change that perspective from a whole population, changing their course of thoughts and making them understand that high birth rates would lead to overpopulation, which at the end will not be sustainable neither for them nor for their future generations to come.

Health and Environment