that occur between the gases and the local environment. The highest concentrations in magmatic gases are water vapor
(H2O), carbon dioxide (CO2), sulfur dioxide (SO2),
hydrogen (H2), carbon monoxide (
CO), and hydrogen sulfide (H2S).
Other minor gases include sulfur (S2), carbonyl sulfide (OCS), methane
(CH4), hydrogen chloride (HCl), hydrogen fluoride (HF), and hydrogen
bromide (HBr). Many other
/volcanoes/volcanic-hazards/volcanic-gases/