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Sunday, 25 November 2018

Which among the following is the most abundant greenhouse gas in the earth's atmosphere

  By GK Planet Team       Sunday, 25 November 2018
Q. Which among the following is the most abundant greenhouse gas in the earth's atmosphere :
  1. Carbon dioxide
  2. Water vapour
  3. Sulphur dioxide
  4. Tropospheric Ozone
Answer: Water Vapour

Greenhouse Gases

A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range. Greenhouse gases cause the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide and ozone. Without greenhouse gases, the average temperature of Earth's surface would be about −18 °C (0 °F), rather than the present average of 15 °C (59 °F). The atmospheres of Venus, Mars and Titan also contain greenhouse gases.
Greenhouse gases are those that absorb and emit infrared radiation in the wavelength range emitted by Earth.
In order, the most abundant greenhouse gases in Earth's atmosphere are:
  • Water vapor (H
    2
    O
    )
  • Carbon dioxide (CO
    2
    )
  • Methane (CH
    4
    )
  • Nitrous oxide (N
    2
    O
    )
  • Ozone (O
    3
    )
  • Chlorofluorocarbons (CFCs)
  • Hydrofluorocarbons (incl. HCFCs and HFCs)
Human activities since the beginning of the Industrial Revolution (around 1750) have produced a 40% increase in the atmospheric concentration of carbon dioxide (CO2), from 280 ppm in 1750 to 406 ppm in early 2017.
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