6.7 Challenges of Urban Sustainability

Urban sustainability challenges

Rapid urban growth creates problems like traffic congestion, inadequate infrastructure, housing shortages, pollution, and crime. Cities in the periphery face these issues most acutely due to rapid, unplanned growth and lack of resources, while core cities struggle with aging infrastructure and suburban sprawl's environmental costs.

Suburban sprawl & its costs

Sprawl is the unplanned, low-density outward growth of cities, often enabled by cars and highways. It increases dependence on automobiles, consumes farmland, raises infrastructure costs, and contributes to urban decay in city centers as people and businesses relocate outward, leaving vacant buildings behind.

Planning for sustainability

Solutions include smart growth policies, new urbanism (walkable, mixed-use design), greenbelts to limit sprawl, improved public transportation, and mixed-use development. In peripheral cities, challenges like squatter settlements and lack of clean water/sanitation require investment in infrastructure and housing policy.

Key terms

Sprawl

Unplanned, low-density outward growth of a city, often dependent on automobiles.

New urbanism

Planning approach promoting walkable, mixed-use, compact neighborhoods.

Greenbelt

A ring of protected open land around a city that limits urban sprawl.

Squatter settlement

Informal, unplanned housing area lacking infrastructure, common in rapidly growing peripheral cities.

Urban decay

Deterioration of city infrastructure and neighborhoods, often due to population and business loss to suburbs.

Try an AP-style question

The urban heat island effect occurs because…

1. cities are at higher elevation
2. cities have more trees
3. pavement and buildings absorb heat
4. cities have less sunlight