Final answer:
Increased car ownership in larger cities is often the result of the need for personal transportation due to urban layout, commuting requirements, and the conveniences offered by economies of scale. However, this leads to issues like traffic congestion and environmental pollution, representing the diseconomies of urban agglomerations.
Step-by-step explanation:
A larger city population often leads to increased car ownership because the layout of cities and suburbs typically require vehicles for commuting and accessing necessary services such as schools, medical facilities, and shopping areas not within walking distance.
Urbanization brings with it challenges like traffic congestion, and requiring personal transportation to navigate the spread-out urban landscape. Moreover, as people are attracted to cities for their economic advantages, or economies of scale, such as a large customer base for businesses, the necessity of owning a car becomes even more apparent.
However, the concentration of activities in cities can lead to diseconomies of scale, such as overcrowded facilities, increased pollution, and heightened crime rates, which are compounded by higher car ownership and usage rates.