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Based on per molecule, which of the following gas has the most powerful greenhouse effect?
 

Option: 1

Co2


Option: 2

CH4


Option: 3

N2O

 


Option: 4

CFCs


Answers (1)

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Among the options provided, chlorofluorocarbons (CFCs) have the most powerful greenhouse effect per molecule.

CFCs are a class of synthetic compounds that contain carbon, chlorine, and fluorine atoms. They were commonly used as refrigerants, propellants, and solvents in various industrial and consumer applications. However, they have been largely phased out due to their detrimental impact on the ozone layer.

While CFCs have a relatively low concentration in the Earth's atmosphere compared to other greenhouse gases, they are extremely potent in terms of their ability to trap heat. CFC molecules have a high radiative efficiency, meaning that they can absorb and emit infrared radiation effectively, leading to a strong greenhouse effect. Additionally, CFCs have a long atmospheric lifetime, which allows them to persist in the atmosphere and continue to contribute to the greenhouse effect for an extended period.

However, it is important to note that the production and use of CFCs have been largely regulated and phased out under international agreements such as the Montreal Protocol, due to their destructive impact on the ozone layer. Other greenhouse gases, such as carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), are currently the primary contributors to the greenhouse effect and climate change. Hence, the correct answer is option 4. 

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