Key term for Edexcel GCSE Geography B, used in Sustainability Strategies in Megacities.
The amount of dissolved oxygen needed by aerobic biological organisms to break down organic material in a given water sample; used as an indicator of water pollution levels.
Biochemical Oxygen Demand (BOD) appears in Edexcel GCSE Geography B revision content for Urbanisation Challenges, especially Sustainability Strategies in Megacities and Strategies for sustainability.
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