There is always an abundance of natural resources for the different begins inside a region, and they too are very precious or we can say valuable because most of these sources if existed may turn very badly for more the just one individual. While, our planet is considered to be the only habitable place inside this universe to live for all the living beings, just because we have a lot to lose if we do not get enough of these vital natural resources required for our survival.
So, for more then thousand centuries human have evolved itself as according to its need and for that there are have been very few times when we experienced lack of products important for our survival.However, due to high high number of individuals inside the civilizations there are certain precautions taken by the international communities in order to limit our as according to the natural resources present for our survival. Because, human body is much complex and evolved then ever and for that reason we can live inside such an environment where the natural resources are much less then always.
This is a bit tricky, but in general, it is climate change that is the source of the greatest disagreement among American politicians, because some people still think it doesn't exist.
