Core

2. Ecosystems and Ecology

• 2.1 Species and Populations
• 2.2 Communities and ecosystems
• 2.3 Flows of energy and matter
• 2.5 Investigation ecosystems

4. Water and aquatic food production systems and societies

• 4.1 Introduction to water systems
• 4.4 Water pollution

5. Soil systems and terrestrial food production systems and societies

• 5.1 Introduction to soil systems
• 5.3 Soil degradation and conservation

6. Atmospheric systems and societies

• 6.1 Introduction to the atmosphere
• 6.2 Stratospheric ozone
• 6.3 Photochemical smog
• 6.4 Acid deposition