Chlorofluorocarbons (CFCs) are a problem because they A. have been released in large quantities in the past B. break down to reactive free chlorine atoms C. attack ozone molecules in the upper atmosphere D. all of the above I know its C and A is pretty much true but I am really not sure about B so I don't know if it is D or just C. Please help
llm
Answered on
Explanation : Chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs) and halons destroy the earth's protective ozone layer, which shields the earth from harmful ultraviolet (UV-B) rays generated from the sun. CFCs and HCFCs also warm the lower atmosphere of the earth, changing global climate.
Correct answer is d .