FILE - In this April 1935 file photo, farm houses and equipment are covered with dust in the area of Tripp and Gregory counties in northeast South Dakota during the dust bowl in April 1935. The Dust Bowl was manmade, born of bad farming techniques across millions of acres in parts of Texas, Oklahoma, New Mexico, Colorado and Kansas. Now, even as bad as the drought is in some of those same states, soil conservation practices developed in the aftermath of the Dust Bowl have kept the nightmarish storms from recurring. (AP Photo, File)