Volcanism is a process by which the earth landscape evolves and transforms itself in the geologic history. The works of the volcanic events create a distinct system of interaction between the earth's surface and the interior as the, and mass has developed due to the evolution of the tectonic plates that have existed as super-landmasses owe its origin to the mid-oceanic ridges.
Like the upwelling of the lavas or the magmas on the surface of the earth creates a zone of opening in the earth crust was the gases can escape and lower the pressure from within the earth and hence release of these gases like the nitrogen sulfur and methane play an important role in the greenhouse effect of the earth.
