2023 Edexcel GCSE Geography A (1GA0) 模擬試題連答案詳解

Model Answer Outline:

Introduction:

• Acknowledge the UK's severe housing shortage, driven by population growth, smaller household sizes, and regional imbalances (mostly focused in the South East).


• Define brownfield sites (previously developed land that is currently disused) and sustainability (meeting environmental, economic, and social needs now without compromising the future).

Arguments supporting brownfield development (Sustainability Pros):

• Environmental: Protects the UK's countryside and rural ecosystems (greenfields/Green Belt) from urban sprawl, preserving agricultural land and biodiversity. It also reduces carbon emissions by locating residents closer to existing urban centers, promoting public transport, walking, and cycling over car dependency.


• Social: Revitalizes decaying inner-city areas, turning derelict, unsightly land into safe, usable spaces. It keeps communities together and places people near existing services (schools, clinics, jobs).


• Economic: Redevelopment utilizes existing infrastructure (sewage, water, electricity, roads), reducing the massive public expenditure required to build new networks.

Arguments against brownfield development / Limitations (Sustainability Cons):

• Economic/Cost: Brownfield sites are often highly contaminated from past industrial use (heavy metals, toxic waste). Decontaminating land is extremely expensive and time-consuming, making sites financially non-viable for private developers without government subsidies.


• Physical/Scale: Many brownfield sites are small, fragmented, or awkwardly shaped, making it difficult to construct large-scale, high-density affordable housing schemes to meet the massive deficit (estimated 300,000 new homes needed annually).


• Social: Urban brownfield land is often located in areas with existing high levels of air pollution, traffic congestion, and noise, which may impact residents' quality of life. Families often prefer larger, suburban houses with private gardens, which brownfield sites cannot easily accommodate.

Alternative Options (e.g., Greenfield development):

• Greenfield sites are easier and cheaper to build on, allowing developers to build larger, master-planned sustainable communities (e.g., garden villages). However, this permanently destroys natural habitats, increases flood risk due to increased impermeable surfaces, and fuels commuter-belt car use.

Conclusion:

• While brownfield development is highly sustainable from an environmental and resource-efficiency perspective, it is not a complete silver bullet. Due to the high cost of decontamination and the sheer scale of the UK housing crisis, a combined strategy is required. This would integrate brownfield regeneration with carefully managed greenfield expansions (such as sustainable 'garden cities') to meet social, economic, and environmental goals holistically.

Marking Grid (12 Marks Total):

Level 1 (1–3 marks): Basic / Isolated Knowledge

• Demonstrates isolated elements of simple geographical knowledge. Very limited or no understanding of brownfield/greenfield concepts or sustainability.


• No synoptic links to other geographical topics (e.g., ecosystem loss, urban environments, or resource management).


• A simple opinion is stated with little or no supporting evidence.

Level 2 (4–6 marks): Developing / Unbalanced Discussion

• Demonstrates some geographical knowledge and understanding of brownfield sites and housing pressures.


• Discussion is likely one-sided (focusing only on the benefits of brownfield sites) or descriptive rather than analytical.


• Some synoptic links are attempted (e.g., mentioning urban regeneration or habitat loss) but are not fully developed or integrated.


• An basic conclusion is provided but lacks a strong justification.

Level 3 (7–9 marks): Clear / Structured Discussion

• Demonstrates detailed geographical knowledge and understanding of both sides of the debate (brownfield vs. greenfield/other options) in the context of sustainability (social, economic, environmental).


• Maintains a balanced and structured discussion throughout.


• Clear synoptic connections are made, linking housing demand to other parts of the curriculum (such as the preservation of ecosystems/biodiversity, urban air quality, or transport infrastructure).


• A reasoned conclusion is reached, supported by geographical evidence.

Level 4 (10–12 marks): Sophisticated / Evaluative Discussion

• Demonstrates precise, comprehensive, and detailed geographical knowledge of the housing crisis, sustainability criteria, and brownfield/greenfield differences.


• Critically evaluates the statement, weighing economic viability (decontamination costs) against environmental and social sustainability.


• Excellent synoptic integration, seamlessly linking physical geography impacts (e.g., flood risk, green space, carbon emissions) with human geography impacts (urban decay, services, regional economic divides).


• Produces a highly coherent, logically structured argument ending in a well-justified, balanced conclusion on whether brownfield land is the "most" sustainable way.