CourseCourse QuestionQuestionDocumentDocument

IB Environmental Systems and Societies

Topic 1: Foundation

Topic 2: Ecology

Topic 3: Biodiversity and conservation

Topic 6: Atmosphere and climate change

6.1 Introduction to the atmosphere

6.2 Climate change—causes and impacts

6.3 Climate change—mitigation and adaptation

6.4 Stratospheric ozone

6.4.1—Solar radiation spectrum

6.4.2—UV radiation danger

6.4.3—Stratospheric ozone protection

6.4.4—UV radiation impacts

6.4.5—Ozone equilibrium

6.4.6—Ozone-depleting substances (ODSs)

6.4.7—Ozone depletion effects

6.4.8—Montreal Protocol

6.4.9—Montreal Protocol success

6.4.10 (HL)—ODS mechanisms

6.4.11 (HL)—Polar stratospheric ozone depletion

6.4.12 (HL)—HFCs

6.4.13 (HL)—Air conditioning issues

Topic 7: Natural resources

Topic 8: Human populations and urban systems

IB/ESS/HL//Concept/Topic 6: Atmosphere and climate change/6.4 Stratospheric ozone/6.4.6—Ozone-depleting substances (ODSs)

Topic 6: Atmosphere and climate change

Syllabus: First assessment 2026
Section: —
Level: HL

Exam analysis

Most tested topics

Introduction to the atmosphere
Climate change—causes and impacts
Climate change—mitigation and adaptation
Stratospheric ozone