Question :
The Montreal Protocol bans the production of which of the following chemical substances?
1. Chlorine, bromine, CFCs, freons
2. Carbon tetrachloride, halons, trichloroethane, CFCs
3. CFCs, bromine, halons, freons
4. CFCs, halons, freons
Answer :
2 - Carbon tetrachloride, halons, trichloroethane, CFCs
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