Greg O’Toole’s company, O’Toole, Inc., in Letts, Iowa, has been in the business of supplying farmers with what they need since 1981. Iowa grows more corn than any other state in the United States, at 2.5 billion bushels of corn a year, and the United States leads in corn production across the world, at 13.7 billion bushels a year, according to the Iowa Corn Growers Association. Greg chose a Monolithic Dome to contain the urea he supplies to keep that corn and other crops growing. … read more