(A) 14% and 6%
(B) 20% and 14%
(C) 20% and 16%
(D) 60% and 20%.
The Correct Answer is (B) 20% and 14%
Solution
The major contribution of methane [CH4] towards the greenhouse effect is 20%
The major contribution of CFCs towards the greenhouse effect is 14%
The gases that trap heat in the earth’s atmosphere are called Greenhouse Gases.
The Primary Greenhouse Gases are:
- Ozone [ O₃]
- Methane [CH4]
- Water Vapour
- Nitrous oxide [N2O]
- Carbon dioxide [CO2]
Other Greenhouse Gases are:
- Carbon monoxide [CO]
- Chlorofluorocarbons [CFCs]
- Black carbon (soot) and brown carbon.
- Fluorinated gases There are four fluorinated gases, the most concentrated and longest-lasting kind of greenhouse gases emitted by human activities. Hydrofluorocarbons (HFCs), sulfur hexafluoride (SF6), perfluorocarbons (PFCs) and nitrogen trifluoride (NF3) are four types of fluorinated gases.
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