Unit 1: Biotic and Abiotic Factors in Ecosystems
Unit 2: Interdependence of Environmental Resources
Unit 3: Energy Flow in the Environment
Unit 4: Population Dynamics
Unit 5: Natural Environmental Changes
Unit 6: Humans and the Environment: Emissions and Pollutants
Unit 7: Humans and the Environment: Individual and Collective Actions
Unit 8: Humans and the Environment: Ethics, Economics, and Legislation