The Montreal Protocol was signed to phase out use of CHCs and HCFCs and replace them with HFCs. What advantage(s) is / are offered by HFCs over CHCs and HCFCs?
1. HFCs are ozone friendly in comparison to CHCs and HCFCs
2. HFCs are not proved to posses potential to contribute to global warming
Select the correct option from the codes given below:

Answer: [A] Only 1

Montreal Protocol is a UN treaty signed in 1987 to ban ozone-depleting substances like chloroflurocarbons (CFCs) and hydrochloroflurocarbons (HCFCs), which were used in refrigerators and air conditioners. HFCs were brought into replace the ozone-depleting substances but it was proved later that the ozone friendly gas has a potent warming effect.

This question is a part of GKToday's Integrated IAS General Studies Module