Senator James Inhofe (R-OK) sent a letter to the Environmental Protection Agency Administrator Lisa Jackson June 12 asking that the agency take additional steps to verify that renewable fuel credits being sold by producers are valid rather than penalizing companies that buy fraudulent credits in good faith. He asked Administrator Jackson to respond within 14 business days about the agency’s plans to improve the program. The following day, he sent a separate letter protesting that Environmental Protection Agency regulations on coal-fired electrical generation are leading to uneconomical plant closings.