Global Sustainability Challenges

1. Global Sustainability Challenges and Issues

a) Key Global Challenges

• Overconsumption creates excessive pressure on natural resources, threatening their availability.
• Population ageing is accelerating worldwide, impacting social and economic systems.
• Unequal access to vital resources such as water and food persists:
  • Hunger is driven mainly by armed conflicts, repeated economic crises, climate change, and structural failures in the global agricultural and food system.
• Poverty remains widespread: 712 million people live below the $2.15/day poverty line.
• Wealth inequality is stark: the richest 1% capture about 27% of global income.
• Biodiversity loss threatens ecosystem health; the extinction of even small species can disrupt planetary functions.
• Dependence on fossil fuels remains high, with oil accounting for 40% of energy consumption.
• Top greenhouse gas emitter: China.

b) Planetary Boundaries Framework (2009)

Defines a safe operating space for humanity by identifying nine critical Earth system processes:

c) Limitations of GDP as a Sustainability Measure

• GDP measures economic activity but does not capture well-being, quality of life, or environmental sustainability.
• It ignores resource depletion, social inequality, and ecological damage.
• Alternative indicators are needed to assess sustainable development more holistically.

d) Alternative Development Indicators

e) Principles of Sustainable Economies

• Green Economy: Emphasizes reducing environmental risks and ecological scarcities while promoting social equity.
• Circular Economy: Focuses on minimizing waste and making the most of resources through reuse, recycling, and regeneration.
• Wellbeing Economy: Prioritizes human and ecological well-being over GDP growth.
• Doughnut Economics: Balances meeting human needs (social foundation) without exceeding planetary boundaries (ecological ceiling).

> The core challenge of global sustainability is balancing human development with the planet’s ecological limits to ensure a viable future for all.

1. Planetary Boundaries: Definition and Purpose

• Planetary Boundaries define the safe limits within which humanity can operate without causing destabilization of Earth's critical systems.
• Crossing these boundaries risks irreversible environmental change threatening global stability and human well-being.
• The concept identifies nine key Earth system processes with quantifiable thresholds.

2. The Nine Planetary Boundaries

Key idea: Human activities must remain within these boundaries to keep Earth’s systems stable and habitable.

3. Evolution of the Concept

• In 2016, the planetary boundaries framework was integrated into a "wedding cake" model of the Sustainable Development Goals (SDGs).
• This model places the economy as a subsystem of society, which itself operates within the planet’s safe operating space.
• It highlights a new development paradigm: economic activities should serve societal needs without breaching planetary limits.

4. Economic Interpretation of Sustainability

• Sustainability means meeting present needs without compromising future generations' ability to meet theirs.
• It rests on three pillars: environment, economy, and society.
• Two approaches to sustainability:

• Example: The tourism sector requires strong sustainability to maintain the environmental quality that attracts visitors long-term.

5. Capital Stock Model in Sustainability

• Sustainable development involves managing both economic income and natural capital stocks.
• Economic activities should not degrade natural capital beyond recovery, ensuring long-term viability.

> To ensure global sustainability, human development must operate within planetary boundaries, respecting the irreplaceability of natural systems and integrating economic and social needs accordingly.

1. Capital Stock and Sustainability

• Wealth is a stock of capital representing opportunities (e.g., a forest is natural capital that can provide wood as income).
• Sustainable development (Sd) means living off the interest generated by capital without reducing the capital stock itself.
• The key rule: use the "fruits" (income) but not cut into the "trunk" (capital stock).

2. Weak vs Strong Sustainability

The distinction depends on the exchangeability of capital stocks:

3. GDP and Economic Growth

• GDP (Gross Domestic Product) measures the total monetary value of all goods and services produced in a country over a specific period.
• It is traditionally used to measure economic growth.
• Economic growth can raise living standards and well-being but often causes natural resource depletion and climate change.
• Limitations of GDP: It does not account for environmental degradation or quality of life beyond economic output.

To respect sustainability, economic activities must not reduce the overall capital stock, ensuring long-term well-being.

1. Limitations of GDP as a Measure of Well-being and Quality of Life

• GDP measures only market value of goods and services; non-market activities are excluded.
• Focuses on quantity over quality of goods and services.
• Ignores the value of national heritage and natural resources, often treating depletion as neutral or positive.
• Provides no information on wealth distribution or inequalities.
• Does not account for the mobility of production factors, limiting its ability to approximate true well-being.

2. Alternative Development Indicators

Key point: GDP alone is insufficient to measure well-being or sustainable development; alternative indicators incorporate social, environmental, and subjective dimensions for a fuller picture.

1. Sustainable Development Measurement Systems

Sustainable development measurement systems aim to assess progress towards sustainability by using various indicators and frameworks. However, their effectiveness is often limited by data quality, indicator overload, and lack of prioritization.

2. Key Measurement Frameworks and Indicators

3. Common Challenges in Sustainable Development Measurement

• Data quality and collection issues limit reliability.
• Large number of indicators complicates interpretation and decision-making.
• Lack of hierarchy or weighting among indicators reduces clarity on priorities.
• Absence of monetary or financial stability measures in many systems.
• Focus often on trends and directions rather than absolute targets.

> Sustainable development measurement systems provide essential insights but must balance comprehensiveness with clarity and data quality to effectively guide policy and public understanding.

1. Green Economy

• Definition: An economic model that accounts for resource limitations and respects the regenerative capacity of renewable resources.
• Goal: To improve resource efficiency and thereby enhance overall economic performance and wellbeing.
• Emphasizes sustainable use of natural resources to maintain long-term economic and social health.

2. Green Growth

• Focuses on fostering economic growth while ensuring that natural assets continue to provide the resources and environmental services on which well-being relies.
• Seeks to decouple economic growth from environmental degradation.

3. Circular Economy

• Definition: A system where materials never become waste and nature is regenerated.
• Key processes: maintenance, reuse, recycling, composting.
• Purpose: To keep products and materials in circulation, reducing the consumption of finite resources.
• Benefits: Tackles climate change, biodiversity loss, waste, and pollution by decoupling economic activity from resource consumption.

4. Wellbeing Economy: From GDP to the Doughnut Theory

• Moves beyond GDP to consider both human needs and planetary boundaries.
• Doughnut Model Components:

The Doughnut model defines the balance between meeting human needs and respecting Earth's limits, guiding sustainable development.