““Scientists estimate that it took a thousand years for an inch of topsoil to accumulate on the arid high plains. It was the work of a moment to blow it away. Topsoil exposed by the disc plows turned to dust, and the dust began to eddy, roil, and lift on the wind. “Rolling dusters,” they were called, or “black blizzards.” There were fourteen of them in 1932. The year after that, thirty-eight.””
