Sustainability
Sustainability is the natural capacity of ecosystems to maintain equilibrium between resource inputs and waste outputs while continuing to support life.
- It focuses on maintaining or improving the health and stability of both societal and ecological systems without diminishing the capacity of future generations to meet their needs.
- Sustainability depends on:
- Resilience: Systems must withstand disturbances (e.g., droughts, market crashes).
- Equilibrium: Inputs and outputs should balance over long timescales.
- Adaptability: Systems must evolve to remain functional amid environmental or social change.
- How can we balance economic growth with environmental protection?
- Should high-income countries bear more responsibility for achieving global sustainability?
Relationship Between Resilience and Sustainability
- Sustainability is about the long-term survival of a system without depleting resources or degrading the environment.
- Enhancing system resilience increases sustainability because resilient systems are better able to adapt to challenges like climate change, resource scarcity, or economic shifts. In other words, the more resilient a system is, the more likely it is to remain sustainable over time.
- Resilience and sustainability are interlinked.
- Resilience enables systems to recover from disturbance, while sustainability ensures that recovery is possible indefinitely.
Sustainable Agriculture
- Practices like crop rotation, organic farming, and soil conservation increase the resilience of agricultural systems.
- This ensures that soil remains fertile and yields are sustainable, supporting future generations of farmers without depleting land resources.
Biodiversity Conservation
- Protecting species diversity and ecosystems increases ecological resilience, making natural systems more adaptable to disturbances like droughts, floods, or climate change.
- A diverse ecosystem can better maintain essential functions such as pollination and water filtration, supporting human and ecological sustainability.
Local and Global Perspectives
- Local scale: Small community-based initiatives (e.g., sustainable farming, water recycling).
- Global scale: Cooperation on global issues such as climate change, deforestation, and biodiversity loss.
Traditional irrigation methods in arid regions may be more sustainable locally than importing high-tech systems that require external maintenance.
Sustainability and Its Three Pillars
- Sustainability is built upon three interconnected pillars:
- Environmental Pillar
- Social Pilar
- Economic Pillar
- Each pillar is interdependent, and neglecting one weakens the entire system.
1. Environmental Pillar
- The environmental pillar focuses on the preservation and responsible management of the Earth's natural resources.
- It includes protecting ecosystems, biodiversity, and the atmosphere, ensuring that environmental processes can continue to support life for future generations.
2. Social Pillar
- The social pillar focuses on ensuring social equity, well-being, and justice.
- It addresses issues like education, health, human rights, and community well-being.
- A sustainable society is one where people have access to opportunities, are treated equally, and can live with dignity and respect.
3. Economic Pillar
- The economic pillar focuses on ensuring that economies grow in a way that is both financially viable and environmentally responsible.
- It involves fostering economic stability, growth, and jobs, but in a way that doesn't exhaust resources or harm ecosystems.
Sustainable Tourism
- Environmental: minimizes waste and habitat destruction.
- Social: supports local cultures and employment.
- Economic: generates income without exhausting local resources.
Interconnection Between the Three Pillars
Sustainability is a balance between the three pillars:
- Environmental sustainability ensures resources are maintained and ecosystems stay healthy.
- Social sustainability guarantees that societies thrive and people’s rights and needs are met.
- Economic sustainability drives growth without causing long-term harm to the environment or people.
Models of Sustainability
1. Weak Sustainability (Overlapping Circles Model)
Weak sustainability model
A weak sustainability model is a sustainability model that shows overlapping relationships between the three pillars: environment, society, and economy.
- In this model, the environment, society, and economy are represented as three equal circles that partially overlap.
- Sustainability lies in the intersection of the three circles.
- It assumes that the three domains can substitute for one another (e.g., economic growth can offset environmental loss).
- This model is considered weak because it underestimates the dependence of the economy and society on the environment.
- Economic development might be prioritized, with the assumption that technology or innovation (e.g., renewable energy or artificial systems) can replace environmental resources.
- For instance, economic growth could continue as long as technological solutions (such as carbon capture) are found to mitigate the environmental impact, even if natural ecosystems degrade.
2. Strong Sustainability (Nested Circle Model)
Strong sustainability model
A strong sustainability model is a sustainability model that depicts the environment as a foundation that supports both society and the economy.
- In this moel, the economy is nested within society, and both are nested within the natural environment.
- The environment provides the foundation and limits for all human and economic activity.
- Economic and social well-being depend on ecological health.
- Natural resources (clean water, fertile soil) are essential for economic growth and social well-being, but cannot be overused without compromising the environment’s ability to regenerate.
- Overfishing or deforestation can harm the ecosystem, which in turn harms the economy and society by depleting resources and harming livelihoods.
Environmental sustainability
Environmental sustainability
Environmental sustainability refers to the use and management of natural resources in a way that ensures they can be replenished, and ecosystems can recover and regenerate over time.
- Environmental sustainability involves the responsible use, management, and regeneration of natural resources to ensure that ecosystems can continue to provide services indefinitely.
- It includes resource replacement, pollution control, and biodiversity conservation, ensuring that natural systems remain capable of renewal.
Core Principles
- Renewability: Harvesting renewable resources (e.g., timber, fish) only at rates that allow natural regeneration.
- Resource Efficiency: Minimizing waste and maximizing the life cycle of materials.
- Pollution Prevention: Reducing emissions and pollutants to maintain environmental health.
- Ecosystem Restoration: Actively repairing degraded ecosystems (e.g., reforestation, wetland restoration).
- Biodiversity Conservation: Protecting genetic, species, and ecosystem diversity to maintain resilience.
Natural Capital and Natural Income
| Term | Meaning | Example |
|---|---|---|
| Natural Capital | The total stock of natural resources providing goods and services. | Forests, oceans, freshwater, fertile soil. |
| Natural Income | The yield or output obtained from natural capital. | Timber growth, fish reproduction, freshwater recharge. |
Timescales of Resource Renewal
- Renewable resources (e.g., forests, fresh water, biomass) replenish naturally within human time frames.
- Non-renewable resources (e.g., fossil fuels, metals) form over geological periods and are effectively finite.
- Sustainability depends on transitioning from non-renewable to renewable sources and ensuring regeneration rates exceed extraction rates.
Using non-renewables is like spending savings while using renewables wisely is like living on interest without touching capital.
Resource Depletion and Pollution
- Resource Depletion: Occurs when extraction > replacement. Leads to declining natural capital.
- Pollution: Occurs when contaminants enter the environment faster than they can be neutralized.
- Deforestation → loss of carbon storage and biodiversity.
- Overfishing → collapse of marine food chains.
- Fossil fuel combustion → greenhouse gas buildup and climate change.
- Industrial waste → soil and water toxicity.
- Assuming pollution is only chemical contamination.
- It also includes thermal, sound, and light pollution that alter ecosystem processes.
Biodiversity and Ecosystem Regeneration
- Biodiversity is essential for ecosystem resilience and productivity.
- Active regeneration, such as rewilding, wetland restoration, and coral reef rebuilding, restores lost ecological functions.
- Reintroducing native species re-establishes the trophic balance and nutrient cycling.
National policies to restore forests and promote eco-tourism helped regain biodiversity, reduce erosion, and increase carbon storage.
Pollution Management Hierarchy
- Prevention: Replace pollutant sources (renewable energy, sustainable materials).
- Control: Treat waste at the source (filters, scrubbers, effluent plants).
- Remediation: Clean up damaged sites (bioremediation, phytoremediation).
Sustainable Forestry in Scandinavia
- Approach: Harvest one tree, plant two; monitor growth cycles.
- Outcome: Forest cover remains stable for > 100 years.
- Benefits:
- Continuous supply of timber (economic)
- Carbon sequestration and climate regulation (environmental)
- Employment and community stability (social)
Social Sustainability
Social sustainability
Social sustainability refers to the development and maintenance of structures and systems that support human well-being, ensuring that societies remain stable, inclusive, and resilient over time.
- Social sustainability focuses on maintaining and improving the quality of life, equity, and cultural continuity within societies.
- It ensures that social systems remain stable, just, and inclusive across generations.
- This involves health, education, community resilience, and cultural preservation.
Core Components of Social Sustainability
- Equity and Justice: Fair distribution of resources and opportunities for all groups.
- Health and Education: Access to basic services that promote well-being and informed decision-making.
- Cultural Continuity: Preservation of languages, traditions, and belief systems that shape identity.
- Community Cohesion: Social networks that enhance trust, cooperation, and resilience in times of stress.
- Participation and Governance: Involvement of all citizens in decision-making processes, especially marginalized communities.
Cultural Sustainability
- Cultural sustainability involves preserving languages, beliefs, and spiritual practices that shape community identity.
- It ensures intergenerational transmission of traditional knowledge, especially indigenous ecological wisdom that supports environmental stewardship.
Why is Social Sustainability Important?
- Interconnectedness: Social systems are deeply linked to environmental and economic systems.
- Resilience: Communities with strong social structures are better equipped to withstand challenges like natural disasters or economic downturns.
- Cultural Survival: Preserving cultural practices enriches global diversity and fosters a sense of identity and belonging.
Challenges to Social Sustainability
- Wealth Gaps: Disparities in income and resources hinder equitable access to education, healthcare, and opportunities.
- Globalization: While it connects people, it can also lead to the loss of traditional languages and practices.
- Conflict and Corruption: Undermine efforts to build sustainable social systems.
- The Maori of New Zealand use kaitiakitanga (guardianship), a spiritual and practical ethic promoting the protection of natural resources for future generations.
- This principle is embedded in environmental law today, illustrating the role of cultural values in environmental stewardship.
The Dongria Kondh Tribe, India
Context
- The Dongria Kondh tribe in Odisha, India, depends on forests for food, farming, and spiritual life.
- Mining company Vedanta Resources proposed a bauxite mine on their sacred mountain (Niyamgiri Hills).
- The community protested, supported by NGOs and activists.
- In 2010, India’s Environment Ministry blocked the project, recognizing the tribe’s cultural and ecological rights.
Why It Matters:
- Protecting indigenous rights preserves cultural sustainability.
- Prevents social displacement and environmental degradation.
- Demonstrates social equity and participatory governance in sustainability policy.
Economic Sustainability
Economic sustainability
Economic sustainability refers to the development of economic structures and systems that allow for the long-term production and consumption of goods and services in a way that meets human needs without depleting natural resources or causing irreversible environmental damage.
- Economic sustainability ensures that economic systems support human needs without depleting natural or social resources.
- It involves creating long-term economic structures that are stable, equitable, and ecologically responsible.
- Economic sustainability is only achievable when environmental limits and social fairness are respected.
Key Components of Economic Sustainability
- Efficient resource use: Minimize waste, optimize productivity.
- Long-term planning: Investment in renewable resources and green technologies.
- Equity: Fair distribution of wealth and access to resources.
- Circular economy: Design products for reuse, recycling, and minimal waste.
- Economic resilience: Ability to recover from market, environmental, or political shocks.
- Ethical consumption: Reducing overconsumption and promoting responsible production.
- Assuming that economic growth alone will solve environmental problems.
- Without sustainable practices, growth often exacerbates resource depletion and inequality.
Economic vs Environmental Link
- Economic growth depends on the availability of natural resources.
- Overexploitation of these resources leads to a decline in productivity, loss of biodiversity, and system collapse.
- Sustainable economic models maintain capital renewal, ensuring the rate of resource use ≤ rate of regeneration.
Bhutan’s Gross National Happiness (GNH)
- Bhutan measures success through GNH, not GDP.
- GNH emphasizes environmental conservation, cultural integrity, and spiritual well-being alongside economic growth.
- The government mandates that at least 60% of land remain forested.
- The impacts include:
- Stable carbon balance (Bhutan is carbon-negative).
- Stronger community health and education systems.
- Sustainable tourism and agriculture sectors.
Ethical Consumption and Waste Management
- Adopting the 4Rs "Reduce, Refuse, Reuse, Recycle" minimizes economic waste.
- Ethical consumption encourages buying from responsible producers and supports supply chains that pay fair wages and avoid environmental harm.
- Promotes corporate accountability and reduces greenwashing (false environmental claims).
Approaches to Achieving Economic Sustainability
- Green Technologies: Promote renewable energy, waste reduction, and energy-efficient infrastructure.
- Sustainable Agriculture: Organic farming, low-input systems, soil regeneration.
- Ecological Economics: Assign real monetary value to ecosystem services and environmental costs.
- Policy Interventions: Tax incentives for clean energy, penalties for pollution, or subsidies for sustainable industries.
- Ethical Consumption: Encouraging consumers to buy products that meet environmental and labor standards.
- Define sustainability and explain how system resilience contributes to it.
- Compare weak and strong sustainability models with examples.
- Describe two ways government intervention can promote long-term sustainable growth.
- Evaluate Bhutan’s Gross National Happiness model as an alternative to GDP.


