Question

Which of the following is not true about greenhouse gases?

• A. greenhouse gas is a gas that absorbs a and not emits radiant energy within the thermal infrared range.
• B. Water vapour is a greenhouse gas
• C. Greenhouse gases absorb heat and warm the atmosphere
• D. None

Answer 1

Answer:

A. greenhouse gas is a gas that absorbs a and not emits radiant energy within the thermal infrared range.

greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range. Increasing greenhouse gas emissions cause the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide and ozone. Without greenhouse gases, the average temperature of Earth's surface would be about 18 °C , rather than the present average of 15 °C (59 °F). The atmospheres of Venus, Mars and Titan also contain greenhouse gases.