The Environmental Protection Agency has not yet sent for White House review a proposed rule that would establish industry wide greenhouse gas emissions limits for power plants, leading some industry groups to suggest that the rule could be delayed. The agency has a deadline of July 26 to propose the new source performance standards and emissions guidelines for greenhouse gases from power plants as part of a legal settlement with states and environmental groups, but the EPA still needs to have the proposed rule reviewed by the Office of Management and Budget, which can take up to 90 days.