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Concentration of which of the following Green house gas is not directly influenced by human activities?
1. Ozone
2. Carbon dioxide
3. Water Vapour
4. Methane

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Correct Answer - Option 3 : Water Vapour

The Correct answer is Water Vapour.

  • Greenhouse gases are those that absorb and emit infrared radiation in the wavelength range emitted by Earth.
  • Carbon dioxide (0.04%), nitrous oxide, methane, and ozone are trace gases that account for almost 0.1% of Earth's atmosphere and have an appreciable greenhouse effect. In order, the most abundant (clarification needed) greenhouse gases in Earth's atmosphere are
  1. Water vapour (H2O)
  2. Carbon dioxide (CO2)
  3. Methane (CH4)
  4. Nitrous oxide (N2O)
  5. Ozone (O3)
  6. Chlorofluorocarbons (CFCs)
  7. Hydrofluorocarbons (includes HCFCs and HFCs)
  • Out of these GHGs Water Vapour is not created by human activity. All the other GHG are emitted through Vehicular emission, Industry, Cooling Devices etc.
  • Atmospheric concentrations are determined by the balance between sources (emissions of the gas from human activities and natural systems) and sinks (the removal of the gas from the atmosphere by conversion to a different chemical compound or absorption by bodies of water)

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