The Housing Gap: When the demand for housing exceeds the formal supply, informal settlements or 'slums' emerge. These areas are often built on marginal land (such as steep slopes or floodplains) and lack basic services like piped water, electricity, and sewage systems.
Transport Congestion: Rapid growth often leads to a mismatch between the city's layout and its transport needs. Over-reliance on private vehicles and inadequate public transit infrastructure result in severe traffic congestion, which reduces economic productivity and increases carbon emissions.
Service Saturation: Public services such as schools, hospitals, and emergency services often operate far beyond their intended capacity in rapidly growing cities. This saturation leads to a decline in the quality of care and education, further entrenching cycles of poverty.
| Feature | Developed City Challenges | Developing City Challenges |
|---|---|---|
| Primary Issue | Aging infrastructure and gentrification | Rapid growth and lack of basic services |
| Housing | High cost of living and homelessness | Proliferation of informal settlements (slums) |
| Economy | Transitioning from industrial to service-based | Large, unregulated informal employment sector |
| Environment | Carbon footprint and waste reduction | Lack of sanitation and industrial pollution |
Push vs. Pull Factors: It is critical to distinguish between factors that drive people away from rural areas (push), such as crop failure or lack of services, and factors that attract them to cities (pull), such as perceived job opportunities and better education. Understanding this balance helps planners predict migration trends.
Brownfield vs. Greenfield Development: Brownfield sites are previously developed lands that are currently underused or contaminated, while Greenfield sites are untouched natural or agricultural lands. Sustainable urban planning prioritizes Brownfield redevelopment to prevent urban sprawl.
Identify Cause-Effect Chains: In exams, avoid simply listing problems. Instead, explain how one challenge triggers another; for example, 'Inadequate waste management leads to blocked drainage systems, which increases the risk of urban flooding and waterborne diseases.'
Use the Sustainability Triple Bottom Line: When evaluating solutions to urban challenges, always consider the Economic (cost/jobs), Social (equity/health), and Environmental (pollution/biodiversity) impacts. A solution that only addresses one dimension is often incomplete.
Check for Scale: Distinguish between local challenges (e.g., neighborhood noise pollution) and systemic challenges (e.g., regional water scarcity). Examiners look for students who can categorize problems by their geographic and administrative scale.
