Why Megacity Challenges Are So Hard to Solve
Part of Urban Sustainability and Megacities — GCSE Geography
This causation covers Why Megacity Challenges Are So Hard to Solve within Urban Sustainability and Megacities for GCSE Geography. Revise Urban Sustainability and Megacities in Urban Issues and Challenges for GCSE Geography with 15 exam-style questions and 20 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 7 of 14 in this topic. Use this causation to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 7 of 14
Practice
15 questions
Recall
20 flashcards
⛓️ Why Megacity Challenges Are So Hard to Solve
It is not enough to list megacity challenges — examiners want to understand why they exist and why they are so persistent. The answer lies in a series of interconnected cause-chains. Each problem makes the others worse. This is called a compound urban challenge.
Dhaka gains 300,000 residents per year. A new water treatment plant takes 5–10 years to plan, fund, and build. A metro line takes 15–20 years. The city is always a decade behind its own population. The result: more people sharing the same inadequate infrastructure, which makes every service worse even as investment increases.
In Dhaka, 40% of residents live in informal settlements without legal land title. They cannot be formally taxed. The city's tax base is therefore far smaller than its population. Less tax revenue means less money for infrastructure, which means more people living without services, which means more poverty — a trap that compounds over generations.
In areas like Dharavi or Dhaka's bastis, land ownership is disputed, buildings are tightly packed, and infrastructure cannot be simply laid over the top of existing structures. Upgrading requires either demolition (which destroys communities) or the politically difficult task of retrofitting services into dense, legally complex areas.
Flooding was already a problem in Dhaka and Mumbai before climate change. Rising sea levels, more intense monsoons, and more frequent extreme weather events mean that flood protection infrastructure must do ever more work — and the poorest residents, who cannot afford to live on higher ground or in better-built homes, are exposed first and worst.
They are qualitatively different — the scale, the speed of change, the interaction between different challenges, and the limited resources available in LICs and NEEs combine to create situations that require fundamentally different approaches from those used in wealthy, slowly-growing cities.