IAS Score

All India PT Mock Test (OMR Based) Across 20 Cities

will be conducted on 6th May and 20th May, 2018. Click here for Test Schedule & Online admission.

Test Center List:

  1. Delhi
  2. Jammu
  3. Chandigarh
  4. Ahmedabad
  5. Bhopal
  6. Lucknow
  7. Allahabad
  8. Patna
  9. Ranchi
  10. Kolkata
  11. Bhubaneswar
  12. Raipur
  13. Jaipur
  14. Mumbai
  15. Pune
  16. Nagpur
  17. Hyderabad
  18. Chennai
  19. Coimbatore
  20. Bengaluru

Industries and Pollutants

The World Health Organization defines air pollution as “the presence of materials in the air in such concentration which are harmful to man and his environment.”

Sources of air pollution broadly divided into two subcategories stationary sources and mobile sources, which can be further divided into two sub-categories as below:

i) Line sources: When the emission source is in the form of line or curve e.g. transportation of material by conveyor belts, road rollers and run-off seepage etc.

ii) Area Sources: These sources are mobile but concentrated over a specific area. Examples: airports, railway stations, bus stands and ports.

Major Industry-wise/ Source-wise emission of pollutants :

Practice question:

1 Which of the following are Grossly Polluting Industries?
1. Petro-chemical industry
2. Packaging & printing
3. Tannery
4. Textile, Bleaching & Dyeing


a) 1, 2 and 3

b) 2,3 and 4

c) 1, 3 and 4

d) All

Ans: d
Exp: Industrial units are classified in following sectors.
• Chemicals: which mainly include fertilizer, petro-chemical , pesticides and pharmaceuticals.
• Distillery
• Dairy, Food & Beverage
• Pulp and Paper Sugar
• Tannery
• Textile, Bleaching & Dyeing
• Other (Cement, Slaughter house, Ordinance, Packaging & printing, Paint, Electronics& Electrical, Thermal, Kattha –kachh, Electroplating, Metallurgical, automobile etc.


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