A canopy of water once shielded man from the suns radiation true or false

The statement that a canopy of water once shielded man from the sun's radiation is True.

Explanation:

The canopy of water forms a wall of boundary around the earth's outer surface which does not let the harmful radiations of the sun which is also known as the ultra violet rays to reach the inner surface of the earth, therefore protecting the people from the radiations of the sun by blocking the UV rays.