OKLAHOMA CITY -- The U.S. Environmental Protection Agency is considering a crackdown on farm dust, so senators have signed a letter addressing their concerns on the possible regulations. Many in the Oklahoma farming industry are opposed to the EPA's consideration. One farmer said the possible regulations are ridiculous. Roberts, a fourth generation farmer and rancher in Arcadia, said regulating dust in rural areas will hurt farmers' harvest, cultivation and livelihood. "Anytime you work ground, you're going to have dust. I don't know how they'll regulate it," Roberts said. "The regulations are going to put us down and keep us from...