IB ESS 2.2.20 Human activity impacts

IB Environmental Systems and Societies syllabusESS SL/HLFirst assessment 2026

Practise analysing how fossil fuel use, deforestation, urbanisation and agriculture alter productivity and food-web stability.

How this is tested

link a human activity to reduced primary productivity in an ecosystem
explain how habitat change or pollution can disrupt feeding relationships in a food web

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