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The gas that causes atmospheric pollution is?
1. Sulphur dioxide
2. Steam
3. Oxygen
4.  Nitrogen

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Correct Answer - Option 1 : Sulphur dioxide

The correct answer is Sulphur dioxide.

  • Sulphur dioxide is a gas that pollutes the air.

  • Chemical formula- SO2 
    • Sulphur dioxide is a colourless, water-soluble gas with a pungent smell that forms sulfuric acid when combined with water.
    • This colourless gas results from burning fossils fuels, including coal and oil and gas.
    • Natural sources of sulphur dioxide include geothermal activity.
    • It cannot be seen by the naked eye.
    • It poses a danger to human health.
    • Breathing SO2 increases the risk of health conditions including stroke, heart disease, asthma, lung cancer and premature death.
    • Sulphur dioxide can cause acid rain which seriously affects ecosystems.
    • Lichens are good bio-indicators of pollution as they do not like to grow where there is sulphur dioxide in the air.

  • Oxygen and Nitrogen are basic components of the natural atmosphere and are non-polluting.
  • The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen.
  • There are other gases too like carbon dioxide, neon, and hydrogen but in minor quantities.
  • Steam is just water vapour that does not cause pollution.

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