APES
Unit 1
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The Living World
Ecosystem Structure
Energy Flow
Ecosystem Diversity
Natural Ecosystem Change
Natural Biogeochemical Cycles
Population
Population Biology Concepts
Human Population
Earth Systems and Resources
Land and Water Use
Energy Resources and Consumption
Pollution
Global Change
The Living World: Natural Biogeochemical Cycles
Content covered:
Carbon
Nitrogen
Phosphorus
Sulfur
Water
Conservation of matter