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1.1 Perspectives

1.2 Systems

1.3 Sustainability

2.1 Individuals, populations, communities and ecosystems

2.2 Energy and biomass in ecosystems

2.3 Biogeochemical cycles

2.4 Climate and biomes

2.5 Zonation, succession and change in ecosystems

3.1 Biodiversity and evolution

3.2 Human impact on biodiversity

3.3 Conservation and regeneration

4.1 Water systems

4.2 Water access, use and security

4.3 Aquatic food production systems

4.4 Water pollution

5.1 Soil

5.2 Agriculture and food

6.1 Introduction to the atmosphere

6.2 Climate change - causes and impact

6.3 Climate change - mitigation and adaptation

6.4 Stratospheric ozone

7.1 Natural resources - uses and management

7.2 Energy sources - uses and management

7.3 Solid waste

8.1 Human populations

8.2 Urban systems and urban planning

8.3 Urban air pollution

HL.a Environmental law

HL.b Environmental economics

HL.c Environmental ethics

IB Environmental systems and societies 6.3G Tragedy of the Commons in Action Key Definitions

Definition

Tragedy of the commons

The tragedy of the commons describes a situation where individuals or nations overuse a shared resource for personal gain, causing long-term harm to the whole group.

IB Environmental systems and societies 6.3G Tragedy of the Commons in Action Key Definitions

Definition

Tragedy of the commons

The tragedy of the commons describes a situation where individuals or nations overuse a shared resource for personal gain, causing long-term harm to the whole group.