Explanation:

The Kigali Amendment, named after the Rwadan capital where it was negotiated, enables the phase-out of hydroflurocarbons, a set of chemicals notorious for their capacity to warm the planet. 

• Union Cabinet has recently approved the ratification of the Kigali Amendment to the Montreal Protocol on Substances that deplete the ozone layer.
• In 2016, Kigali amendment was agreed by more than 170 countries and came into force in 2019.
• It is legally binding.
• The amendment aims to phase down Hydroflurocarbon (HFC) i.e to achieve over 80% reduction in HFC by 2047.
• HFCs were introduced as a replacement to ozone depleting substances such as chlorofluorocarbons and hydro chlorofluorocarbons.
• Thus, HFCs have zero ozone depleting potential but known to be hundreds, even thousands, of times more potent than carbon dioxide in their ability to cause global warming.
• With the Kigali Amendment, the Montreal Protocol has become an even more powerful instrument against global warming.
• Under the amendment, India’s reduction of Hydroflurocarbon (HFC) will begin from 2028 and target is to reduce it by 80% by the year 2047.

Hence both statements 2&3 are correct.