There are so many problems that you cannot possibly write them all. And there are some problems that we are not even aware of. One problem that I see is the potential for more wars. There are many factors for this. First, there may be wars based on competing ideologies and religions. The world has always faced this and will continue to do so. Just think of Israel and the middle Eastern countries. Second, there is always a limited amount of natural resources. Therefore, there will disputes over the obtaining of these resources. Finally, think about what a full war would look like today. It would be the end of civilization as we know it, if it becomes nuclear.
The scientific factors alluded to in the previous posts were very accurate. I think that another problem being faced right now is how to navigate through the new paradigms that have emerged in the 21st century. For example, the greatness and perils of globalization might be one such narrative. On one hand, we have come to accept the greatness of a world without borders, yet we also have had to understand how to navigate the challenges of outsourcing work to other nations and the impact this creates on many nations. The global grip of terrorism and what exactly this means in the larger scope is another challenge facing humanity right now. How this challenge is navigated will be another moment that shall test resolve and force us to engage in some agonizing reflection.
Some of the problems facing humanity at this moment are the same old ones we have suffered from, and not learned from, in the past. I speak of continuing battles for land, wars about power and battles about forcing one's religion on other people. Such conflicts result in refugees, migration, disease, epidemic, famine and thirst. In addition, we now have new problems caused by land-grabs, jungle deforestation, pollution and burning fossil fuels. Therefore, we have new challenges to deal with in the twentyfirst century as all these things have consequences in terms of erosion, drought and global warming that contributes to climate change. Soon we may have to deal with rising water levels and floods.
Researchers from the SUNY College of Environmental Science and Forestry (ESF) said that the top problems which humanity is facing right now are: overpopulation,the need to develop and spread in the world sustainable solutions, the need of increasingly higher energy conservation, the need for people to realize that they are part of the gobal ecosystem, carbon dioxide emissions, the need to develop methods of producing everything from renewable resources and decreasing of drinking water resources.
Overpopulation of the planet is the biggest problem mankind is facing. Then it is followed by climate changes. At the same time, we must find solutions for using renewable energy resources.
Overcrowding means adding to the atmosphere a quantity of carbon dioxide, higher than it should. This is related to general consumption of products, especially in developed countries of the world.