With pressure mounting on the entire biofuel industry, farmers, biofuel employees and lawmakers waited anxiously last week for the Trump administration to announce a plan to address the use of small refinery waivers that have diminished demand for renewable fuels.

The Environmental Protection Agency’s (EPA) growing use of waivers, which exempt refiners from requirements to blend biofuels, has been blamed for the closing of a second ethanol plant in Iowa. Siouxland Energy Cooperative in Sioux Center recently told employees that it wouldn't reopen its 80-million-gallon plant after a...