human
I've heard that the ozone layer is being damaged by the use of CFCs in aerosol sprays. Is this true?
assistant
Yes, it’s true. The Montreal Protocol was signed in 1987 to protect the ozone layer from further damage. This led to a reduction in the use of certain chemicals called chlorofluorocarbons (CFCs). These are used as propellants in spray cans and other aerosol products.