The two gases that were a part of both stage two and stage three in the formation of the atmosphere are carbon dioxide and nitrogen.
The atmosphere consists of five primary layers, these are- troposphere, stratosphere, mesosphere, thermosphere, and exosphere. The second layer is the stratosphere and the third layer is the mesosphere. The stratosphere was formed by ices from comets and from gases that were released by volcanic eruptions and pushed into the atmosphere. The mesosphere is situated just above the stratosphere and right below the thermosphere. The two gases which were prevalent in the generation of both these layers are nitrogen and carbon dioxide.
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