5(d)
5(d) Human influences on the environment
7 specification points in sub-topic 5(d).
Specification points
5.125.135.145.155.165.175.18B
5.12: Air pollution by sulfur dioxide and carbon monoxide
Sulfur dioxide causes acid rain, and carbon monoxide reduces how much oxygen the blood can carry.
5.13: Greenhouse gases
Greenhouse gases and how they trap heat radiated from the Earth.
5.14: Human activities and greenhouse gases
How human activities such as burning fossil fuels and farming add greenhouse gases to the air.
5.15: Enhanced greenhouse effect and global warming
How more greenhouse gases may lead to global warming and its effects.
5.16: Water pollution by sewage
How untreated sewage pollutes water and kills aquatic animals.
5.17: Eutrophication
Eutrophication: how fertiliser run-off leads to algal blooms and fish deaths.
5.18B: Deforestation
The effects of deforestation on soil, the water cycle, the carbon cycle and the air.