By 52%-54% denisty indicator of lithium bromide, it is used to be absorptive refrigerant, hypnagogue and mitigative of medicine, and also to be electrolyte in ion-battery.
About 80% of the chlorine in the atmosphere is a legacy of chlorofluorocarbons, chemicals used in aerosol sprays and as refrigerants starting in the 1930s.
In addition to that, ammonia is also used as a refrigerant gas, as well as in the manufacture of plastic, fabrics, pesticides and to purify water supplies.
A 1987 agreement called the Montreal Protocol banned a series of chemicals — mainly used in refrigerants and aerosols — believed to have reduced the thickness of the ozone layer.