Biological Consequences of Air Pollution (Edexcel IGCSE Science)

The Effects of Air Pollution

Spec point — 4.12 · understand the biological consequences of pollution of air by sulfur dioxide and carbon monoxide

Air pollution

• There are several biological consequence of air pollution due to a range of different pollutant gases:

  • Carbon monoxide (CO) pollution:

    • Binds to haemoglobin, reducing oxygen transport in blood.
    • Can lead to suffocation and death in high concentrations.

  • Sulfur dioxide (SO₂) pollution:

    • Combines with water vapor to form acid rain, damaging plants, aquatic life, and soil.
    • Causes respiratory problems in humans.

Air pollution and acid rain

How air pollution leads to acid rain