States seek review of RFS waivers
Midwest attorneys general say refiners appear to be manipulating hardship waiver system.

Iowa Attorney General Brenna Bird, along with attorneys general from Nebraska and South Dakota, are asking federal authorities to review recent small refinery waivers from the Renewable Fuel Standard (RFS). 

The group alleged in a letter last week that some companies are manipulating the system with claims of disproportionate economic hardship on their waiver applications while...