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The main gasses that are released during a volcanic eruption are water vapor, carbon dioxide, nitrogen, sulfur, and lesser amounts of chlorine, hydrogen, and argon. carbon dioâ¦xide, carbon monoxide, sulfur hydrogen.
The two most abundant gases in any layer of the atmosphere are nitrogen and oxygen. In the stratosphere, ozone composition increases from 0.04 parts per million in other layerâ¦s to 5-12 ppm. However, this does NOT make ozone more abundant than nitrogen and oxygen. 2 people found this useful.