IB ESS 4.2.3 Water supply increase needs
IB ESS 4.2.3 Water supply increase needs

IB Environmental Systems and Societies syllabusESS SL/HLFirst assessment 2026
Practise using demand data to explain why water supplies must increase for domestic use, farming, livestock and industry.
How this is tested
- calculate a percentage or proportion from projected water-use data in a figure
- outline why population growth, diet change or development increases water demand
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