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Topic 1: Foundation
1.1 Perspectives
1.2 Systems
1.3 Sustainability
Topic 2: Ecology
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
Topic 3: Conservation and biodiversity
3.1 Biodiversity and evolution
3.2 Human impact on biodiversity
3.3 Conservation and regeneration
Topic 4: Water
4.1 Water systems
4.2 Water access, use and security
4.3 Aquatic food production systems
4.4 Water pollution
Topic 5: Land
5.1 Soil
5.2 Agriculture and food
Topic 6: Atmosphere and climate change
6.1 Introduction to the atmosphere
6.2 Climate change - causes and impact
6.3 Climate change - mitigation and adaptation
6.4 Stratospheric ozone
Topic 7: Natural resources
7.1 Natural resources - uses and management
7.2 Energy sources - uses and management
7.3 Solid waste
Topic 8: Human populations and urban systems
8.1 Human populations
8.2 Urban systems and urban planning
8.3 Urban air pollution
HL lenses
HL.a Environmental law
HL.b Environmental economics
HL.c Environmental ethics
Habitat
A habitat is the physical location where a species lives and interacts with its environment.
pH
pH measures hydrogen ion concentration, influencing chemical reactions in water.