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Topic 1: Foundation
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
Topic 4: Water
Topic 5: Land
Topic 6: Atmosphere and climate change
Topic 7: Natural resources
Topic 8: Human populations and urban systems
HL lenses
