List of problems in the world
- List of problems in the world today
- List of problems in the world that need to be solved
- List of problems in the world and solutions
- List of social problems in the world
- List of major problems in the world
- List of environmental problems in the world
- List of biggest problems in the world
- List of small problems in the world
- List of wicked problems in the world
- List of big problems in the world
- List of unsolved problems in the world
- List of scientific problems in the world today
- List of minor problems in the world
- List of problems around the world
- List 10 social problems in the world