Final answer:
The three problems caused by the fast growth of cities are overpopulation, unemployment, and pollution.
Step-by-step explanation:
The three problems caused by the fast growth of cities are:
- Overpopulation: The rapid influx of people to cities leads to overcrowding, with limited space and resources to accommodate everyone.
- Unemployment: As cities grow, so does the competition for jobs, resulting in higher rates of unemployment.
- Pollution: The increased concentration of people, cars, and factories in cities contributes to higher levels of pollution, such as air and water pollution.