• It is also called as freon-11, Trichlorofluoromethane or R-11.
• It is one of a class of compounds called chlorofluorocarbons that is responsible for destroying atmospheric ozone.
• It is also a ‘Starlink’ constellation that contributes to atmospheric warming.
• Before being included in production moratorium agreed in the Montreal Protocol of 1987 it was widely being used as a refrigerant.

Despite being a signatory to Montreal Protocol, and agreeing to phase out the production of harmful CFC-11 in 2010, China continues to emit ozone depleting CFC-11 in violation of Montreal Protocol.

About Montreal Protocol is a legally binding international pact signed in 1987 to preserve degradation of atmospheric ozone layer that blocks harmful ultraviolet (UV) radiation from sun. Excessive amounts of some types of UV radiation can cause eye damage and skin cancer in people and are also harmful to crops and vegetation.