Steam, Sulfur dioxide, Carbon Dioxide.
Volcanoes emit several gases, and not very nice ones (hence the reason that nothing living can exist inside the crater of a volcano). Two gases that volcanoes emit that are NOT poisonous include water and carbon dioxide. On the other hand, they also emit nasty gases like sulfur dioxide.
The two main gases emitted from volcanoes are water vapor (steam) and carbon dioxide. These gases are released during volcanic eruptions along with other gases like sulfur dioxide, hydrogen sulfide, and carbon monoxide.
There is no gases that comes out of a volcano that is not poisonous all gases that comes from a volcano is dangerous.
The main gases in Earth's atmosphere are nitrogen, followed by oxygen.
Hydrogen and Helium
Hydrogen and helium are the two main gases in the Universe.
There are not two gases in the layer but one. Ozone is the only gas present in the ozone layer.
canada
Two main gases exchange in the lungs: oxygen and carbon dioxide.
Hydrogen and helium
usually Argon or Nitrogen
amonia, hydrogen,