Sustainability is one of the most important — and most misunderstood — concepts in environmental studies. It is not simply about ‘saving the environment.’ Rather, sustainability involves maintaining the conditions for human and ecological wellbeing across time and across the dimensions of environment, society, and economy. Understanding the pillars of sustainability, their interdependence, and the critiques of the sustainability framework is fundamental to VCE Outdoor and Environmental Studies Unit 4.
The most widely used definition comes from the Brundtland Report (1987) — Our Common Future, published by the United Nations World Commission on Environment and Development:
“Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs.”
This definition contains two key ideas:
1. Present needs: Current generations have legitimate needs that must be met
2. Future generations: Meeting present needs must not come at the cost of future generations’ ability to meet their own needs
Sustainability in OES specifically applies to outdoor environments — asking whether current human uses and relationships with outdoor environments can be maintained long-term without degrading the environments themselves.
The sustainability framework is typically represented as three interconnected pillars:
ENVIRONMENTAL
---------+---------
SOCIAL ECONOMIC
Maintaining the ecological systems, biodiversity, and natural processes that support all life.
Key principles:
- Preserve biodiversity and ecosystem function
- Maintain soil, water, and air quality
- Respect planetary boundaries (climate, nitrogen cycle, biodiversity loss)
- Prevent irreversible environmental damage
In outdoor environments: Protecting native vegetation, maintaining water quality in rivers and wetlands, managing fire regimes, preventing habitat fragmentation.
Maintaining the social conditions — equity, health, culture, community — that allow people to live fulfilling lives.
Key principles:
- Equitable access to resources and opportunities
- Preservation of cultural heritage and Indigenous connections to Country
- Community cohesion and wellbeing
- Intergenerational equity — fair treatment of future generations
In outdoor environments: Ensuring public access to natural areas; recognising Indigenous cultural rights; maintaining the mental and physical health benefits that outdoor environments provide; supporting communities whose livelihoods depend on environmental health.
Maintaining economic systems that provide livelihoods and meet material needs without exhausting natural capital.
Key principles:
- Avoid depleting non-renewable resources faster than alternatives can be developed
- Maintain natural capital (the value embedded in ecosystems)
- True-cost accounting (include environmental costs in economic decisions)
- Green economy: economic activity that reduces environmental impact
In outdoor environments: Sustainable tourism, eco-agriculture, carbon farming, sustainable fisheries — economic activities that can continue indefinitely because they do not deplete the resource base.
KEY TAKEAWAY: No pillar is more important than the others — sustainability requires all three to be maintained simultaneously. A community that is economically prosperous but ecologically degraded is not sustainable. A protected wilderness with no economic opportunities or social access is also not sustainable in the long run.
The three pillars are interdependent — changes in one inevitably affect the others:
| Scenario | Environmental Impact | Social Impact | Economic Impact |
|---|---|---|---|
| Overgrazing | Soil erosion, vegetation loss | Loss of pastoral community | Short-term income, long-term farm collapse |
| Protecting a national park | Biodiversity preserved | Recreation, wellbeing benefits | Ecotourism income, but lost grazing income |
| Drought and climate change | Ecosystem stress, fire risk | Community disruption, mental health impacts | Agricultural losses, insurance costs |
| Cultural burning revival | Biodiversity improved, fire risk reduced | Indigenous cultural reconnection | Reduced hazard reduction costs |
The ‘Venn diagram’ model: Sustainability sits at the intersection of all three pillars — it requires simultaneously meeting environmental, social, AND economic needs.
EXAM TIP: Interdependence means you can’t address one pillar in isolation. Exam questions often ask you to explain how a management action affects all three pillars. Practise tracing cause-and-effect chains across pillars.
The three-pillar model has been criticised from multiple directions:
Deep ecology / ecological economics view: The ‘three equal pillars’ model is misleading. The economy exists within society, and society exists within the environment. A degraded environment cannot support a functioning society or economy — environmental sustainability should therefore be the primary constraint.
This is represented as nested circles (not three equal pillars):
[ Environment [ Society [ Economy ] ] ]
Conventional economics allows for substitution between natural and human-made capital — if you destroy a forest, you can ‘compensate’ by building factories. Critics argue this is weak sustainability and is inadequate: some forms of natural capital (biodiversity, stable climate) cannot be replaced by any human-made substitute.
Strong sustainability insists certain natural assets are non-substitutable and must be preserved absolutely.
Many Indigenous scholars and organisations argue the three-pillar model omits cultural sustainability — the maintenance of cultural practices, knowledge systems, and spiritual relationships with Country. Without cultural sustainability, the other three pillars cannot be achieved in an Australian context. Some models add culture as a fourth pillar.
The sustainability framework, as commonly applied, still assumes economic growth is desirable and compatible with sustainability. Degrowth theorists argue that material growth on a finite planet is inherently unsustainable — true sustainability requires stabilising or reducing total material throughput, not just making growth ‘greener.’
VCAA FOCUS: You are expected to analyse both the interdependence between pillars AND related critiques. Don’t just describe the pillars — engage with the critiques. Show you understand the limitations of the framework, not just its content.
Example: Great Ocean Road tourism
| Pillar | Current State | Sustainability Challenge |
|---|---|---|
| Environmental | Coastal erosion accelerating; vehicle access damaging clifftops | Reducing vehicle access; dune revegetation |
| Social | Over-tourism crowding out local community; access for all Australians | Managing visitor numbers while maintaining access |
| Economic | Tourism economy vital for region | Transition from high-volume to high-value, low-impact tourism |
REMEMBER: In OES, sustainability is not abstract — it applies to specific outdoor environments you have visited and studied. Always connect theoretical frameworks to real places and management decisions.