Which of the following chemicals was NOT banned as per Montreal Protocol?
Answer & explanation
Correct answer: option 4
The correct answer is Option 4: None of the above
Montreal Protocol banned the use of chlorofluorocarbon (CFC) compounds, as well as other ozone depleting chemicals such as carbon tetrachloride, trichloroethane (also known as methyl chloroform), and bromine compounds known as halons.