What would have happened if the green house gases

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

'Carbon dioxide, methane, water vapours, nitrous oxide, CFCs and ozone are green house gases. These gases trap some of the heat radiated by the earth’s object near the earth’s surface and keep it warm.This is called natural green house effect because it maintains the temperature and makes the earth perfect for life. If there were no green house gases, there would have no vegetation and life on our earth (because the earth would convert into a cold planet).