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| Q. |
Transboundary pollution (or) Acid rain is caused by – |
| A. | Carbon monoxide |
| B. | Carbon dioxide |
| C. | Hydrocarbon |
| D. | Nitrogen oxide and sulphur dioxide |
| Answer» D. Nitrogen oxide and sulphur dioxide | |
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Explanation: Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it possesses elevated levels of hydrogen ions (low pH). It is caused by emissions of sulfur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids. |
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