This page discusses chlorofluorocarbons (CFCs), a type of alkyl halide, known for their role in aerosol sprays and refrigerants. Their detrimental impact on the ozone layer, notably over Antarctica, r...This page discusses chlorofluorocarbons (CFCs), a type of alkyl halide, known for their role in aerosol sprays and refrigerants. Their detrimental impact on the ozone layer, notably over Antarctica, raised environmental concerns in the late 1970s, leading to a reduction in their use.