Consider the following statements regarding HFCs (HydroFluoroCarbons): 1. They are man-made and also occur naturally. 2. HFCs are powerful greenhouse gases but weak Ozone depleting substances. Which of the above statements is/are correct?

Q. Consider the following statements regarding HFCs (HydroFluoroCarbons):
1. They are man-made and also occur naturally.
2. HFCs are powerful greenhouse gases but weak Ozone depleting substances.
Which of the above statements is/are correct?

[A] 1 only

[B] 2 only

[C] Both 1 and 2

[D] Neither 1 nor 2

Answer: B

Notes:

Statement 1 is incorrect
Statement 2 is correct

About HFCs

HFCs are entirely man-made. They are primarily produced for use in refrigeration, air-conditioning, insulating foams and aerosol propellants, with minor uses as solvents and for fire protection.

HFCs were developed to replace stratospheric ozone-depleting substances (ODS) that are currently being phased out under the Montreal Protocol on Substances that Deplete the Ozone Layer.
Though HFCs do not impact the ozone layer, many HFCs are very powerful greenhouse gases and a substantial number are short-lived climate pollutants with a lifetime of between 15 and 29 years in the atmosphere.

Source: Article

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