Read the full story from NPR.
Soil has been blowing away from the Great Plains ever since farmers first plowed up the prairie. It reached crisis levels during the Dust Bowl of the 1930s, when windblown soil turned day into night.
In recent years, dust storms have returned, driven mainly by drought. But Shook — and others — say farmers are making the problem worse by taking land where grass used to grow and plowing it up, exposing vulnerable soil.