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Indoor pollution

 Indoor pollution is due to 

  1. Radon 
  2. Environment tobacco smoke 
  3. Biological pollutants
  4. Carbon monoxide
  5. Nitrogen dioxide
  6. Volatile organic compounds 
  7. Respiratory particles 
  8. Formaldehyde
  9. Asbestos
  10. Lead 
  11. Pesticides 

Let's discuss one by one 

Radon 

Radon is a colorless orderless gas that is produced from decay of radium. It has low density, therefore it's found in basements. 

Sources of Radon 

Radon is formed from radium, uranium and rocks like phosphate rocks, granite and shales etc. It's also present in soil, building materials, water wells and basements. 

Health effects 

Radon is a gas when it further decays into daughter polonium and lead which are solid particles. These solid particles are attached to air particles like dust . As a result they enter into lungs where they cause health problems. Besides, lead and polonium decays here and produce alpha and beta particles, these particles damage DNA and adversely affect human tissues. 

Control 

In order to avoid Radon poisoning, we should cover or seal the basements or cellers. Besides, we should seal building materials to avoid the exchange of gases from soil. 




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