McqMate
| Q. |
Which one of the following is a major green gas? |
| A. | Carbon dioxide |
| B. | Chloro fluorocarbon |
| C. | Carbon monoxide |
| D. | Freon |
| Answer» A. Carbon dioxide | |
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Explanation: A greenhouse gas (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. The primary greenhouse gases in the Earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide, and ozone. In the Solar System, the atmospheres of Venus, Mars, and Titan also contain gases that cause greenhouse effects. |
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