MCQOPTIONS
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| 1. |
The Chlorofluorocarbon (CFC) remains in atmosphere for |
| A. | 22 to 111 years |
| B. | 30 to 50 years |
| C. | 80 to 90 years |
| D. | 10 to 20 years |
| Answer» B. 30 to 50 years | |