What would have happened if the green house gases were totally missing in the earth's atmosphere. Discuss

(1)The main gases responsible for green house effect are C${{O}{2}}$ C${{H}{4}}$ water vapours, nitrous oxide, CFCs and ozone.
(2) These gases trap the sun’s heat near the earth’s surface and keep it warm. This makes the earth perfect for life.If the amount of C${{O}_{2}}$ cross the delicate limit of 0. 03%, the natural green gets disturbed.
In the absence of green house gases, the average temperature of the earth will decrease drastically. As a result life on earth would be impossible.