IB ESS 6.1.4 Greenhouse effect
IB ESS 6.1.4 Greenhouse effect

IB Environmental Systems and Societies syllabusESS SL/HLFirst assessment 2026
Practise explaining the natural and enhanced greenhouse effect, including how atmospheric gases regulate Earth’s temperature.
How this is tested
- explain how greenhouse gases absorb outgoing infrared radiation to maintain life-supporting temperatures
- distinguish the natural greenhouse effect from enhanced warming caused by human GHG emissions
- outline how increased CO2 concentration can drive broader changes in global climate
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