Step 1: Focusing on the scale of waste generation.
Large cities generate enormous quantities of solid waste every day from homes, markets, offices, and streets.
This waste is highly mixed and cannot be completely recycled or reused.
Step 2: Long-term waste management need.
City waste disposal is not a short-term activity; it requires a method that can safely handle waste for years without harming humans or the environment.
The method must also prevent soil and groundwater pollution.
Step 3: Comparing disposal methods on practicality.
Open dumping lacks pollution control and creates health hazards.
Incineration reduces waste volume but is expensive and creates air pollution.
Composting works only for biodegradable waste and cannot treat all city waste.
Step 4: Identifying the most practical solution.
Sanitary landfills are engineered systems with protective liners, controlled covering, and leachate collection.
They can safely store large volumes of waste and isolate it from air, soil, and water sources.
Final Conclusion:
Considering waste quantity, safety, and long-term effectiveness, the most suitable method of municipal solid waste disposal in large cities is:
\[ \boxed{\text{Sanitary landfill}} \]