Question

What would happen, if the greenhouse gases were totally missing in the earth’s atmosphere?

Answer 1

The solar energy radiated back from the earth’s surface is absorbed by the greenhouse gases. (CO₂, CH₄, O₃, CFCs) are present near the earth’s surface. They heat up the atmosphere near the earth’s surface and keep it warm.
As a result of these, there is the growth of vegetation that supports life. In the absence of this effect, there will be no life of both plant and animal on the surface of the earth.