McqMate
| Q. |
A survey on air pollution was conducted in an urban area to determine the major contaminant in air. The major contaminant estimated in all air pollution is: |
| A. | Grit and dust |
| B. | Sulphur dioxide |
| C. | Carbon monoxide |
| D. | Nitrogen dioxide |
| Answer» B. Sulphur dioxide | |
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