MCQOPTIONS
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| 1. |
According to a study, altering the altitude of less than 2% of flights may reduce aircraft-linked climate change by how much per cent? |
| A. | 31 |
| B. | 37 |
| C. | 45 |
| D. | 59 |
| E. | 63 |
| Answer» E. 63 | |