Q.

List out the major air pollution and describe their effects on human beings ?

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Detailed Solution

Major air pollutants include CO, CO2, SO2, nitrogen oxides, particulate matter, etc.
1. Carbon monoxide (CO):
Source:

  • Incomplete combustion of fossil fuels in automobiles
  • Fumes from factories
  • Forest fires

Effects:

  • Haemoglobin has greater affinity for CO. It competitively interferes with oxygen transport by binding to haemoglobin which forms carboxy haemoglobin.
  • In higher concentration, it leads to coma and death

2. Carbon dioxide (CO2): 

Source:

  • Rapid urbanisation
  • Automobiles
  • Aero planes
  • Power plants 

Effects:

  • It is the main pollutant that is leading to global warming.
     

3. Sulphur dioxide (SO2):
Source:

  • It is produced by burning of fossil fuel.
  • Melting of sulphur ores

Effects:

  • SO2, nitrogen oxides are the major causes of acid rain.
  • High concentration of can result in breathing problems.
  • Exacerbates existing cardiovascular problems.
     

4. Nitrogen oxides:

Sources: 

Mainly auto mobile exhausts.

Effects:

  • It is harmful to humans and animals and also for life of plants.
  • Nitrogen oxides on plants cause necrotic spots on leaves.

5. Particulate matter: Tiny particles of solid matter suspended in a gas or liquid constitute the particulate matter. Aerosols are a combination of particles or liquid droplets and the gas.

Sources:

  • Combustion of fossil fuels 
  • Forest fires 
  • Cement factories

Effects:

  • Inhalation of particulate matter can lead to respiratory tract infections.
  • Lung disorders
  • Premature deaths in severe cases
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