Q. In the earth’s atmosphere, which of the following have the property of absorbing the heat and contribute to the warming of atmosphere?
1. Carbon Dioxide
2. Soot
3. Water Vapour
Select the correct answer using the codes given below:

[A] 1 and 2 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: C


  • Greenhouse gas, any gas that has the property of absorbing infrared radiation (net heat energy) emitted from Earth’s surface and reradiating it back to Earth’s surface, thus contributing to the greenhouse effect.
  • Carbon dioxide, methane, and water vapour are the most important greenhouse gases. (To a lesser extent, surface-level ozone, nitrous oxides, and fluorinated gases also trap infrared radiation.)
  • Greenhouse gases have a profound effect on the energy budget of the Earth system despite making up only a fraction of all atmospheric gases.
  • Concentrations of greenhouse gases have varied substantially during Earth’s history, and these variations have driven substantial climate changes at a wide range of timescales. In general, greenhouse gas concentrations have been particularly high during warm periods and low during cold periods.
  • These gases have a high capacity for absorbing infrared radiation or occur in significant quantities, whereas others have considerably lower capacities for absorption or occur only in trace amounts.

Source: https://climate.mit.edu/ask-mit/how-do-greenhouse-gases-trap-heat-atmosphere#:~:text=Greenhouse%20gas%20molecules%20in%20the,raises%20the%20planet’s%20average%20temperature.