Example of this problem are robbery, murdert, etc.
Crime
It means there isn't enough water for people in an area.
Water Scarcity/Lack of Water
There isn't enough food for everyone.
Hunger
This means extremely poor.
Poverty
There are too many people on earth.
Population growth/Overpopulation
The different ways humans harm the environment e.g. littering and carbon dioxide emission.
Pollutions
Covid-19 is one example of this world problem.
Disease/Illness/Pandemic
People don't have shelters.
Homelessness/Housing
This is a problem caused by pollution when the temperatire of the earth increases.
Global warming
This means two or more countries are fighting with each other.
War/Conflict
This problem means the majority of the citizens is old.
Aging population
This problem is when the people in one place don't know how to read and write.
Illiteracy/Literacy Problem
This is the unfair treatment between and among people e.g. black vs white, caucasian vs asian, etc.
Racism/Inequality