Smog in China. Image credit

Smog in China. Image credit

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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