
Smog in China. Image credit ctvnews.ca
ZIMSEC O Level Combined Science Notes: Environmental Health: Air pollution
- Urban and industrial areas in Zimbabwe produce waste gases which enter the atmosphere
- Often these gases are toxic and contain a high level of smoke particles
- A thick haze of smoke often forms over most big cities
- This is known as smog
- Gas and levels of pollution should monitored as they lead to several problems
- Among them are pollution related diseases
- These include bronchitis
- This is the irritation or inflammation of the bronchi inside the lungs
- Pollution should be regulated around residential and populated areas
- Asbestos and cement dust produced during their manufacture can lead to health problems if breathed in
- Asbestos can lead to Asbestosis a lung disease
- They also lead to increased risk of contracting cancer
- In large cities (mega cities) such as Beijing pollution is a major problem people wear filter masks to protect themselves
To access more topics go to the Combined Science Notes page.
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