Q.

Which of the following is a greenhouse gas?


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a

Methane

b

CO

c

Water Vapour

d

Oxygen 

answer is A.

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Detailed Solution

Concept: Due to the existence of certain gases, including carbon dioxide, methane, nitrous oxide, and fluorinated gases like HFCs, PFCs, and sulphur hexafluoride, the greenhouse effect naturally causes the Earth's surface and atmosphere to warm.
Because of both natural (such as the decomposition of organic matter) and human processes, greenhouse gases are released into the atmosphere (such as burning fossil fuels and agriculture). Instead of the current average of 15°C, the temperature of the globe would have been a frigid -18°C in the absence of the greenhouse effect.
Hence, the correct answer is option 1.
 
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