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Effects of Air Pollution

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Maharashtra State Board: Class 8

Air Pollutants and its Effects:

Sr. No. Air Pollutants Source Effects
1 Sulphur dioxide (SO₂) Factories (where coal and mineral oil are used as fuel) Irritation of eyes, respiratory tract, excess mucus, cough, and difficulty in breathing.
2 Carbon monoxide (CO) Vehicular and industrial smoke Lowered O₂ carrying capacity of blood.
3 Oxides of nitrogen Vehicular smoke Irritation of the respiratory tract and lungs.
4 Particulate matter Vehicular and industrial smoke Respiratory diseases
5 Dust Vehicular and industrial smoke Silicosis
6 Pesticides Production and use of pesticides Mental weakness, death due to prolonged exposure
7 Methane (CH₄) Industrial leakage  
CISCE: Class 12

Key Points: Effects of Air Pollution

  1. On human health: Air pollution causes respiratory diseases like asthma, bronchitis, lung cancer, heart problems, eye irritation, and nervous system damage due to gases and fine particulates.
  2. On animals: Polluted air contaminates forage and water, leading to chronic poisoning, fluorosis, and other diseases in domestic and wild animals.
  3. On plants: Air pollutants damage leaves, reduce photosynthesis, cause chlorosis, necrosis, reduced crop yield, and inhibit growth; lichens act as pollution indicators.
  4. On materials: Pollutants cause corrosion of metals, erosion of buildings and monuments, fading of textiles, and damage to rubber and paints (e.g., Taj Mahal damage).
  5. On atmosphere and climate: Air pollution leads to greenhouse effect, global warming, acid rain, ozone layer depletion, reduced visibility, and long-term climate change.
 
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