Sustainable Urban Living
Sustainability is the idea of meeting the needs of the present without compromising the ability of future generations to meet their own needs. For AQA GCSE Geography, you need to understand how cities can become more sustainable and be able to discuss specific examples of sustainable urban living.
What Is Sustainable Urban Living?
A sustainable city (or eco-city) is one that manages its resources, waste, transport, and energy in ways that minimise environmental damage and maximise quality of life — not just for current residents, but for future generations.
Sustainable urban living involves improvements across several key areas:
| Area | Sustainable Approach |
|---|
| Energy | Renewable energy sources; energy-efficient buildings |
| Transport | Public transport; cycling; walking; electric vehicles |
| Water | Water conservation; rainwater harvesting; recycling grey water |
| Waste | Reduce, reuse, recycle; waste-to-energy; composting |
| Green spaces | Parks, urban forests, green roofs, community gardens |
| Food | Local food production; urban farming; reducing food miles |
| Housing | Eco-homes; insulation; sustainable building materials |
graph TD
A[Sustainable City] --> B[Green Transport]
A --> C[Renewable Energy]
A --> D[Green Spaces]
A --> E[Waste Recycling]
B --> B1[Cycle lanes and trams]
C --> C1[Solar panels and wind turbines]
D --> D1[Parks and urban forests]
E --> E1[Reduce, reuse, recycle]
Why Is Urban Sustainability Important?
Cities occupy only 3% of the Earth's land surface but are responsible for:
- 75% of global energy consumption
- 70% of global CO2 emissions
- 60% of global water consumption
- Most of the world's waste production
With the global urban population expected to reach 6.7 billion by 2050, making cities more sustainable is critical for tackling climate change and resource depletion.
Exam Tip: When discussing urban sustainability, always link it to the global context. The examiner wants to see that you understand why urban sustainability matters beyond individual cities — it is key to addressing climate change.
Case Study: Freiburg, Germany
Freiburg is one of the world's most celebrated sustainable cities and is the example recommended by AQA. It is a city of approximately 230,000 people in south-west Germany, near the Black Forest.
Energy
- Freiburg generates 10% of its electricity from solar power — one of the highest rates of any city in Europe
- Over 400 solar installations on rooftops across the city
- The Solar Settlement (Sonnenschiff) in the Vauban district produces more energy than it consumes — it is an energy-plus development
- Buildings in Vauban are designed to Passivhaus standards — they use up to 90% less energy for heating than conventional buildings
- Combined heat and power (CHP) plants provide district heating, reducing waste energy
Transport
- 70% of Freiburg is accessible by public transport within a short walk
- An extensive tram network (5 lines) runs on 100% renewable energy
- 400 km of cycle paths — one of the most cycle-friendly cities in Germany
- In the Vauban district, car-free living is the norm: residents can own a car but must park it in a multi-storey garage on the edge of the neighbourhood
- Only 150 cars per 1,000 residents in Vauban, compared to ~500 in a typical German city
- Car-sharing schemes are available for residents who need occasional car access
Waste and Recycling
- Freiburg achieves a recycling rate of ~69% — one of the highest in Germany
- Separate collections for paper, glass, plastics, organic waste, and residual waste
- Bio-waste is composted and used for energy generation (biogas)
- The city has a deposit-return scheme for bottles and cans
- Waste-to-energy incineration for non-recyclable waste, generating electricity and heat
Green Spaces
- 44% of Freiburg's area is forested (the Black Forest borders the city)
- Urban parks, community gardens, and allotments are widespread
- Green roofs are encouraged on new developments — they insulate buildings, absorb rainwater, and support biodiversity
- The Dietenbach development (under construction) aims to house 16,000 people in a "climate-neutral" neighbourhood with extensive green infrastructure
Water Conservation
- Rainwater harvesting is integrated into new developments
- Permeable surfaces (rather than tarmac) are used in Vauban to reduce surface runoff and recharge groundwater
- Green roofs absorb rainfall, reducing flood risk
- The city's water treatment works return clean water to the River Dreisam
Exam Tip: Freiburg's Vauban district is the single best example to learn in detail. Memorise the key statistics: solar energy, Passivhaus standards, 150 cars per 1,000 residents, 69% recycling rate.
Case Study: Curitiba, Brazil
Curitiba is a city of approximately 1.9 million people in southern Brazil. It became famous in the 1970s–90s for its innovative approach to sustainable urban planning, particularly in transport and waste management.
Transport: Bus Rapid Transit (BRT)
Curitiba pioneered the Bus Rapid Transit (BRT) system, which has been copied by cities around the world:
- Dedicated bus lanes keep buses separate from other traffic, ensuring fast, reliable journeys
- Tube-shaped bus stops allow passengers to pay before boarding, speeding up loading times
- Articulated and bi-articulated buses carry up to 270 passengers each
- The BRT carries approximately 2 million passengers per day
- The system cost a fraction of what a metro system would have cost (~2millionperkmvs. 100 million per km for a metro)
- Curitiba has one of the lowest car usage rates in Brazil, despite having one of the highest car ownership rates
Waste Management: The "Green Exchange" Programme
- In informal settlements where refuse trucks cannot access narrow streets, the city introduced a "Green Exchange" programme
- Residents bring bags of sorted recyclable waste to collection points and receive bus tickets or fresh food in exchange
- Over 70% of Curitiba's waste is recycled
- This programme improved public health in favelas, reduced litter, and encouraged recycling
- Organic waste is composted and used by local farmers
Green Spaces
- Curitiba has 52 square metres of green space per person — one of the highest ratios in the world
- Parks were deliberately placed in flood-prone areas alongside rivers — they act as natural flood defences and prevent development on vulnerable land
- Lakes in the parks store floodwater during heavy rains, protecting the city from flooding
- The parks also improve air quality, provide recreation, and support biodiversity
Exam Tip: Curitiba is an excellent example to pair with Freiburg. If a question asks about sustainable urban living, using two examples (one from an HIC and one from an NEE) will strengthen your answer.
Sustainable Living in the UK
Sustainable urban initiatives are also being implemented in UK cities:
BedZED (Beddington Zero Energy Development), London
- Located in the London Borough of Sutton
- 100 homes designed to be carbon-neutral
- Features include: solar panels, wind cowls for ventilation, triple glazing, rainwater harvesting, living roofs
- Car club scheme and electric vehicle charging points
- Reduced energy use by ~81% compared to a typical UK development
- However, some green technologies (e.g., the biomass boiler) have had maintenance problems
Other UK examples:
- Manchester: Extensive cycling infrastructure; "Bee Network" integrated transport plan
- Bristol: UK's first "European Green Capital" (2015); expanding cycle network; district heating schemes
- Nottingham: Biogas-powered buses; Workplace Parking Levy funds public transport improvements
Barriers to Sustainable Urban Living
Despite the benefits, there are significant barriers: