We also find that the UN is generally regarded as the most important international organisation in today’s world. In the eyes of many people all over the world, it is indispensable and represents the great hope of humanity for peace and progress.

Which of the following challenge can't be overcome by an individual country and can only be dealt with when everyone works together?

Both 1 and 2

There are issues that are so challenging that they can only be dealt with when everyone works together. The disease is an example. Some diseases can only be eradicated if everyone in the world cooperates in inoculating or vaccinating their populations. Or take global warming and its effects. As temperatures rise because of the increase in greenhouse gases in the atmosphere, there is a danger that sea levels will also rise, thereby submerging many coastal areas of the world including huge cities. Of course, each country can try to find its own solution to the effects of global warming. But in the end, a more effective approach is to stop the warming itself. This requires at least all of the major industrial powers to cooperate.