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Air Pollution and Environmental Resources - Class VI
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QuestionClick to flip
Which is a green house gas?
A) Methane
B) Chlorofluorocarbons
C) $CO _{2}$
AnswerClick to flip back
A
$A, B$ and $C$
💡 Explanation:
Greenhouse effect
* The progressive heating up of surface of the earth is earth is called green house effect or global warming.
$CO _2$ and $H _2O$ block a part of the heat (IR) emitted by the earth & reflect back. Due to this earth surface gets heated up.
50% in $CO _2$ content of air can increase the surface temperature of the earth by $3^oC$.
* In addition to $CO _2$ , the other green - house gases are CFCs (17%), $O _3$ (18%), NO (4%), water vapour (2%).