Q.

Which of the following is the set of greenhouse gases in the atmosphere

1 Ozone and CFC  
2 Carbon monoxide and sulphur dioxide  
3 Carbon dioxide and methane  
4 Hydrogen sulphide and ozone  

Ans.

(3)

Gases that maintain the temperature of the earth by trapping the solar energy in the earth’s atmosphere are called greenhouse gases. Increase in the amount of greenhouse gases in the atmosphere can lead to global warming. Carbon dioxide and methane are the greenhouse gases.