CFCs are substances no longer used in aerosols.
They are man-made chemicals that were developed during the first half of the 20th century. Because of their excellent stability and non-flammable properties they were widely used as aerosol propellants. However, during the 1970s and 80s, scientists discovered a relationship between such substances and ozone depletion. By the end of 1989 the UK aerosol industry had phased out the use of CFCs in retail products and CFC use in Europe is now completely prohibited.