Comprehensive Notes on Sustainable Cities

Sustainable Cities

Introduction to Sustainability

  • Cities are a critical focus for sustainability efforts.
  • Presentation by Çeyiz Makal and Fairclough.

Learning Objectives

  • Define what constitutes a sustainable city.
  • Identify key principles and indicators of urban sustainability.
  • Analyze examples of sustainable cities around the world.
  • Critically evaluate the challenges and trade-offs involved in urban sustainability.

What Makes a City Sustainable?

Definition of a Sustainable City
  • A sustainable city is an urban settlement that follows eco-friendly practices to meet its citizens' basic needs without discrimination.
  • It fulfills the needs of the people by providing necessary infrastructure and civic amenities:
    • Housing
    • Employment
    • Education
    • Transportation
    • Healthcare
    • Good governance
Sustainable Cities: Eco-Cities or Green Cities
  • Sustainable cities, also known as eco-cities or green cities, are urban areas designed and developed to:
    • Minimize environmental impact
    • Promote economic prosperity
    • Enhance social equity and quality of life for residents
  • These cities aim to achieve a balance between economic growth, social development, and environmental sustainability.

Foundations of Sustainable Cities

UN Sustainable Development Goal 11
  • Goal 11 focuses on making cities and human settlements inclusive, safe, resilient, and sustainable.
Key Targets within SDG 11:
  • Affordable housing: Ensure access for all to safe and affordable housing and basic services.
  • Sustainable transport systems: Develop accessible, green, and safe transport.
  • Urban planning: Enhance inclusive and sustainable urbanization and participatory planning.
  • Cultural and natural heritage: Strengthen efforts to protect the world’s cultural and natural heritage.
  • Disaster risk reduction: Reduce the number of people affected by disasters and the economic losses caused.
  • Air quality and waste management: Improve air quality and reduce municipal waste.
  • Access to green spaces: Provide universal access to safe, inclusive green and public spaces.
Importance of Sustainable Cities
  • Over half the world's population now lives in urban areas.
  • Cities consume 70% of global energy and produce over 70% of CO2CO_2 emissions.
  • Making cities sustainable is essential for addressing climate change, poverty, and inequality.

Key Pillars of a Sustainable City

  • The sustainable city is designed, built, and maintained at the intersection of three pillars: social, environmental, and economic.
  • This ensures residents enjoy the highest quality of life with the lowest emissions footprint.
1. Environmental Integrity
  • Definition: Ensuring that urban development does not compromise natural ecosystems.
  • Examples:
    • Pollution control (air, water, soil)
    • Urban biodiversity (e.g., rooftop gardens, wildlife corridors)
    • Climate adaptation (e.g., green roofs to reduce heat islands)
2. Social Equity
  • Definition: All urban residents, regardless of income, race, gender, or disability, should have access to basic needs and opportunities.
  • Examples:
    • Affordable housing and education
    • Equitable access to parks, jobs, and services
    • Inclusive governance (community participation in decision-making)
3. Economic Viability
  • Definition: Cities must support livelihoods, innovation, and sustainable economic growth.
  • Examples:
    • Green jobs and circular economy
    • Supporting local businesses and low-carbon industries
    • Economic resilience in the face of global shocks
4. Good Governance
  • Definition: Transparent, accountable, participatory, and responsive city management.
  • Examples:
    • Public engagement in urban planning
    • Open data and smart city technology
    • Anti-corruption practices and equitable policy enforcement

Examples of Sustainable Cities

Copenhagen, Denmark
  • Known for its bike-friendly culture and carbon neutrality goals.
  • Ranks among the greenest and most liveable cities in the world.
  • Has set ambitious targets and backed them with policy, infrastructure, and citizen engagement.
  • Bike-Friendly Urban Design:
    • Over 62% of residents commute by bicycle every day.
    • More than 400 km of dedicated bike lanes, often separated from car traffic.
    • The "Cycle Superhighway" network connects suburbs to the city center.
    • Infrastructure includes bike traffic lights, elevated bridges (e.g., Cykelslangen), and bike parking hubs.
Kigali, Rwanda
  • Cleanliness, car-free zones, and community-oriented development.
  • Excellent case study for sustainable urban development in the Global South.
  • Offers examples of community-driven sustainability, strong urban governance, and innovative practices that fit the local context.

Sustainable Cities: The Growing Importance

  • The global population increases every year, and technology developments are changing the way we live.
  • The sustainability of our planet is in greater danger than ever before.
  • The release of harmful emissions and extreme levels of waste are becoming unbearable.
  • Governments and local authorities face pressure from citizens, especially Generation Z, who are fighting for environmental change.
  • Cities contribute to global economic growth but are also drivers of environmental degradation.
  • Cities consume 80% of global energy and are responsible for 70% of greenhouse gas emissions.
  • Urban sprawl is the rapid expansion of the geographic extent of cities and towns.
  • Urban extension leads to poor living conditions, making cities highly vulnerable to climate change and threatening biodiversity.
  • By 2050, as much as 70% of the global population is predicted to live in cities.
  • It is important to shift towards compact, low-carbon, resilient, and inclusive cities.

Sustainable Cities: Smart Cities

  • The concept of “smart city” has become more popular in scientific literature and international policies.
What is a Smart City?
  • A smart city is an urban area that utilizes information and communication technologies to improve efficiency, sustainability, and quality of life for its residents.
  • These technologies are integrated into various aspects of city management and infrastructure to enhance services.
  • The primary goal of a smart city is to improve the urban living experience while addressing challenges such as traffic congestion, pollution, inadequate infrastructure, and inefficient public services.
Key Components and Features of Smart Cities
1. ICT Infrastructure
  • Smart cities have robust information and communication technology infrastructure, including high-speed internet connectivity, sensors, data networks, and communication systems.
  • These technologies enable the collection, processing, and analysis of data from various sources across the city.
    • ICT: Information Communication Technology
2. Data Collection and Analysis
  • Smart cities collect and analyze data from various sources (e.g., sensors, cameras, social media) to monitor and analyze aspects of urban life.
  • This includes traffic flow, air quality, energy consumption, waste management, and public safety.
  • Data analytics help city authorities make informed decisions and optimize city services and operations.
3. Smart Mobility
  • Smart cities focus on improving transportation systems to reduce traffic congestion, enhance mobility, and promote sustainable transportation options.
  • This includes intelligent traffic management systems, real-time public transportation tracking, bike-sharing programs, and initiatives to promote electric vehicles.
4. Sustainable Infrastructure
  • Smart cities prioritize sustainable infrastructure solutions to minimize environmental impact and resource consumption.
  • This includes energy-efficient buildings, renewable energy sources, smart grid systems, green spaces, and water conservation measures.
5. Public Services
  • Smart cities leverage technology to enhance the delivery of public services such as healthcare, education, public safety, waste management, and utilities.
  • This may involve digital platforms for citizen engagement, smart healthcare monitoring systems, and emergency response systems.
6. Urban Governance and Citizen Engagement
  • Smart cities implement digital governance solutions to improve transparency, efficiency, and citizen participation in decision-making processes.
  • This includes online platforms for accessing government services, crowdsourcing initiatives for collecting feedback, and digital tools for civic engagement.

The Role of Cities in the Future

  • Cities play a prime role in social and economic aspects worldwide and have a huge impact on the environment.
  • The current scenario requires cities to find ways to manage new challenges.
  • Cities worldwide have started to look for solutions that enable transportation linkages, mixed land uses, and high-quality urban services with long-term positive effects on the economy.
  • High-quality and more efficient public transport that responds to economic needs and connects labor with employment is considered a key element for city growth.
  • Many new approaches related to urban services have been based on harnessing technologies, helping to create "smart cities."
Definitions of Smart Cities
  • A smart city is a high-tech intensive and advanced city that connects people, information, and city elements using new technologies to create a sustainable, greener city, competitive and innovative commerce, and an increased life quality.
  • Being a smart city means using all available technology and resources in an intelligent and coordinated manner to develop urban centers that are at once integrated, habitable, and sustainable.
  • A smart city is a city that is prepared to provide conditions for a healthy and happy community under the challenging conditions that global, environmental, economic and social trends may bring.
  • Smart cities of the future will need sustainable urban development policies where all residents, including the poor, can live well and the attraction of the towns and cities is preserved.
Sustainable City Goals
  • A smart and sustainable city has goals to be achieved in an adaptable, reliable, accessible, and resilient way, such as:
    • Improve the quality of life of its citizens
    • Ensure economic growth with better employment opportunities
    • Improve well-being of its citizens by ensuring access to social and community services
    • Establish an environmentally responsible and sustainable approach to development
    • Ability to address climate change and environmental issues

Urban Transportation and Sustainability

  • Urban transportation has a very strong influence on city sustainability.
  • One of the benefits that citizens should expect is to have reliable, cheap, safe, and abundant transportation.
  • As for the economy, high-frequency services mean many more trams or buses on the streets, involving a huge investment, maintenance, and payroll costs.
  • As for the environment, the more buses, the greater the resulting pollution.
  • The social effect of transportation could be bad for the other two areas: economics and environment.

Case Study: Curitiba, Brazil

  • Curitiba has been transformed from an agricultural city to a manufacturing one through sustainable planning.
  • Curitiba is a large city (1.9 million) in Brazil, dubbed the country’s ecological capital.
  • Its sustainable progress has been hailed as an example for the world.
  • It has faced and overcome challenges that many cities now are dealing with, emerging as a city that works with the environment, has a strong social core, and is focused on developing a green economy.
  • In the 1970s, Curitiba was developing at a fast rate whilst dealing with a population explosion.
  • An architectural student (who would later be mayor of Curitiba) turned Curitiba in a direction of sustainability.
Transportation System in Curitiba
  • The main corridor is a dedicated two-way road for buses.
  • The first adjacent road serves as an access road for cars.
  • The next adjacent corridor serves for both cars and buses on a one-way basis for each side.
  • Buses can arrive up to every 90 seconds and are unaffected by car traffic.
  • The system is designed to give people who live outside of the city an easier way in and reduce people’s commutes by around half an hour.
  • Buses can travel fast and safely because they do not share the road with anything else.
  • They are articulated units and can transport large numbers of people.
  • Access to buses is through innovative tubular stations where the fare is paid before boarding, so drivers are free from fare duties.
  • This system has taken many private cars off the streets, with sharp decreases in air pollution.
  • The buses are diesel-operated and produce less pollution than gasoline-driven cars.
  • There are over 90 miles of bike lanes throughout the city.
  • Much of the city is pedestrianized.
Waste Recycling and Green Initiatives in Curitiba
  • 70% of Curitiba’s waste is recycled.
  • Curitiba provides many services to its citizens, including a water sanitation system which uses a system of local lagoons for filtration.
  • The creation of green zones.
  • Building of a botanical park downtown.
  • Passing laws to discourage cutting down trees while mandating that two trees must be planted for each one cut down.

The Importance of Sustainable Practices

  • Poorly planned urbanization leads to slums, tangled traffic, greenhouse gas emissions, and sprawling suburbs.
  • By choosing to act sustainably, we choose to build cities where all citizens live a decent quality of life and form a part of the city’s productive dynamic, creating shared prosperity and social stability without harming the environment.
  • The cost is minimal in comparison with the benefits.
  • There is a cost to creating a functional public transport network, but the benefits are huge in terms of economic activity, quality of life, the environment, and the overall success of a networked city.

How to Help Achieve Sustainability Goals

  • Take an active interest in the governance and management of your city.
  • Advocate for the kind of city you believe you need.
  • Develop a vision for your building, street, and neighborhood, and act on that vision.
Questions to Consider
  • Are there enough jobs?
  • Can your children walk to school safely?
  • Can you walk with your family at night?
  • How far is the nearest public transport?
  • What’s the air quality like?
  • What are your shared public spaces like?
  • The better the conditions you create in your community, the greater the effect on quality of life.