1. Traffic congestion: Urban population is dense, and traffic congestion is a common problem, especially in rush hours and specific areas.
2. Air pollution: Urban industry, traffic and population density will lead to air pollution, which will do harm to people's health and the environment.
3. Garbage disposal: The amount of urban garbage is huge, and garbage disposal has become one of the difficult problems in urban management.
4. High housing prices: Urban housing prices are rising too fast, making it difficult for ordinary residents to afford housing, especially in some big cities.
5. Insufficient educational resources: the distribution of urban educational resources is uneven, and some areas lack high-quality educational resources.