The Environmental Protection Agency disclosed another five small refinery exemptions Thursday, adding to a climbing volume of exemptions from the federal biofuel mandate.

Supporters of EPA’s upcoming proposal to allow year-round use of gasoline blended with 15 percent ethanol made their case on a call with reporters today, saying that the blend is safe, dependable, and cuts down on smog-forming tailpipe emissions.

President Donald Trump is set to call on the Environmental Protection Agency to begin rulemaking that would allow for summer E15 sales, a move that will engender support from the biofuels sector but also face a likely challenge in the courts.

The Environmental Protection Agency has launched a new website adding more transparency on how the Renewable Fuel Standard is functioning, but biofuel groups say the gesture, while appreciated, doesn’t go far enough.

The Environmental Protection Agency could have a different tool in its toolbox as biofuel and energy interests continue to debate the role of small refiner exemptions in the Renewable Fuel Standard: keep offering the waivers, but on a partial basis.

Ag Secretary Sonny Perdue’s decision to answer a phone call from a number marked “Unknown” may lead to movement on the administration’s stalled efforts to allow year-round sales of E15.

Renewable fuel and energy sector organizations offer comment on EPA's proposed Renewable Fuel Standard blending levels.

Sen. Chuck Grassley, R-Iowa, says the Environmental Protection Agency is no longer considering a controversial provision that would have made exported ethanol and biodiesel eligible for the credits used to measure compliance with the federal blending mandate.

Acting EPA Administrator Andrew Wheeler visited with government officials and agribusiness leaders during a closed-door session Monday, talking about the RFS and WOTUS.