IB ESS 7.1.3 Natural income
IB ESS 7.1.3 Natural income

IB Environmental Systems and Societies syllabusESS SL/HLFirst assessment 2026
Practise linking natural income to yields and services such as fish, timber, water supply and flood protection in named systems.
How this is tested
- explain natural income as the yield from natural capital in a lake, forest or delta
- use water inputs and outputs, or resource data, to state available natural income
- link harvests and services to whether human use keeps natural capital intact
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