MCQOPTIONS
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MCQOPTIONS
| 1. |
Of the following green-house gases, …………. Concentration has increased from 700 ppb at the time of industrial revolution to 1750 recently. |
| A. | Carbondioxide |
| B. | Nitrogen dioxide |
| C. | Ozone |
| D. | Methane |
| Answer» E. | |