problems facing the world in the 21st century. Nowadays a lot of people are worried about the problems facing the world in the 21st century. In my opinion, the biggest problems are epidemics, changing wather conditions, pollutions and terrorism. Firstly, pollution is one of the main problems of this century. Due to contamination, many epidemics are ocurring. Today we have a lot of different epidemics that kill many people all over the world, like Ebola. Moreover, environmental pollution is a global issue . This fact also affect climate change, it is produces that temperature is rising little by little every year, the same happens with the level of oceans and the number of illnesses. Another thing to bear in mind is about one of the biggets international problems, It is terrorism. Many nations are affected, whether directly or indirectly. Terrorism use violence to get what the want.Altough it is a serious problems , all government and nations are helping to end terrorist groups. To sum up, I believe that this four examples are the biggest problem facing the world in this century, It is difficult to end whit all of this, but If we help each other, we will can make a better world.