IB ESS 2.4.9 (HL) Secondary influences

IB Environmental Systems and Societies syllabusESS SL/HLFirst assessment 2026

Practise explaining why local conditions and human interventions can modify biome development beyond temperature and rainfall alone.

How this is tested

explain how local soils, slope or exposure can alter vegetation despite regional climate
assess how human intervention can shift biome development or ecosystem characteristics

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