One of the biggest problems facing the world today
- One of the biggest problems facing the world today is global warming
- Climate change is one of the biggest problems facing the world today
- The migration of people to cities is one of the biggest problems facing the world's cities today
- Air pollution is one of the biggest problems the world is facing today
- What is one of the biggest problem facing the world today
- Во мне миллион моих проблем