Among the following, the one which is not a "green house gas", is

• N₂O

• CO₂

• CH₄

• O₂

The ozone layer forms naturally by :

• the interaction of CFC with oxygen

• the interaction of UV radiation with oxygen

• the interaction of IR radiation with oxygen

• the interaction of oxygen and water vapour

33.

Among the following, the one that is not a green house gas is:

• Methane

• Ozone

• Sulphur dioxide

• Nitrous oxide