Which two gases are most abundantly emitted in volcanic outgassing?
A)nitrogen and oxygen
B)hydrogen and helium
C)carbon dioxide and methane
D)water vapor and sulfur dioxide

Question

Quizplus · Accepted Answer

Water vapor and sulfur dioxide are the two most abundantly emitted gases in volcanic outgassing. Carbon dioxide is also a significant emission, but methane and hydrogen are typically not present in large amounts. Nitrogen and oxygen are already present in the atmosphere and are not heavily emitted by volcanoes. Helium is also emitted by volcanoes, but in much smaller quantities compared to water vapor and sulfur dioxide.

Which Two Gases Are Most Abundantly Emitted in Volcanic Outgassing