Which of the following is the major cause of global warming ?

Reflection of UV rays by

C O_{2}

and

H_{2} O

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Reflection of IR rays by

C O_{2}

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Reflection of IR rays by

O_{2}

and

N_{2}

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Reflection of UV rays by

O_{2}

and

N_{2}

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Solution

The correct option is B Reflection of IR rays by $C O_{2}$
Reflection of IR rays by $C O_{2}$ in the atmosphere. When an Infrared ray photon hits a $C O_{2}$ molecule it vibrates and absorbs the photon and re-emits the photon back. The ability to absorb and re-emit infrared energy is what makes CO₂an effective heat-trapping greenhouse gas.

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