The atmosphere plays a vital role in moderating the amount of electromagnetic radiation necessary to sustain life on earth because atmosphere creates a blanket on overall earth to restrict the incoming harmful rays or electromagnetic radiation.
Explanation:
Atmosphere has five important layers. Each of which plays a significant role in shaping earth's environment. Atmospheric layers are troposphere, stratosphere, mesosphere, ionosphere and exosphere. Stratosphere prevents harmful UV rays from reaching to the earth's surface.
Ozone layer prevents harmful rays from entering into earth environment. Because in the presence of these harmful gases global life will become miserable. Global warming, acid rain are some of the incidents caused due to these harmful gases.