The Montreal Protocol bans the production of which of the following chemical substances?
(a) Chlorine, bromine, CFCs, freons
(b) Carbon tetrachloride, halons, trichloroethane, CFCs
(c) CFCs, bromine, halons, freons
(d) CFCs, halons, freons
The question was asked in an international level competition.
I'd like to ask this question from Ozone Depletion in chapter Atmosphere & Greenhouse Gases of Environmental Engineering