What looks like smoke on the rural horizon just might be dust - farmers across Appanoose County are harvesting soybeans and corn. Sen. Charles Grassley will host a visit from the administrator of the Environmental Protection Agency to see how new dust restrictions could affect Iowa farmers. A recent decision by the EPA does not exempt agriculture and mining from a cap on the amount of dust that can be released into the air. Grassley said Tuesday there is no guarantee that farmers couldn't be sued for the dust they create. "I think it will give him a chance to see first-hand what his rule could do to the American farmer if you couldn't harvest soybeans when the wind is blowing more than two miles an hour," Grassley said.