20.3 Pollution
- Syllabus
- 0610–2026–2027
- Topic
- 20.3
- Level
- —
20.3.1—Effects of untreated sewage and excess
- Describe the effects of untreated sewage and excess fertiliser on aquatic ecosystems
20.3.2—Effects of non-biodegradable plastics
- Describe the effects of non-biodegradable plastics, in both aquatic and terrestrial ecosystems
20.3.3—Sources and effects of pollution
- Describe the sources and effects of pollution of the air by methane and carbon dioxide, limited to: the enhanced greenhouse effect and climate change
20.3.4—Process of eutrophication of water
- Explain the process of eutrophication of water, limited to: • increased availability of nitrate and other ions • increased growth of producers • increased decomposition after death of producers • increased aerobic respiration by decomposers • reduction in dissolved oxygen • death of organisms requiring dissolved oxygen in water
Objective notes
4 learning objectivesConceptIGCSE Biology