Glaciers are a major contributor to creating the Earthy dimension of Earth, air, fire and water necessary for the Midwest's most distinctive quality - agriculture.
(Glaciers; are; a major contributor to creating the Earthy dimension of Earth, air, fire and water necessary for the Midwest's most distinctive quality - agriculture)
Glaciers
are
a major contributor to creating the Earthy dimension of Earth, air, fire and water necessary for the Midwest's most distinctive quality - agriculture