The federal Renewable Fuel Standard (RFS) has been an “unmitigated success” that curbs oil import reliance and creates jobs.

No wait, forget that . . . the national biofuels mandate is actually an “unworkable law that places consumers at risk of high food and fuel costs, engine damage, and environmental harm.”

Those descriptions – from, respectively, an ethanol trade group that backs the RFS and a refining industry group that loathes it – are among the voices that will surface in two days of House hearings that launch Tuesday.

The House Energy and Commerce Committee has posted much of the testimony from the 16 witnesses slated to discuss the RFS, which requires escalating amounts of ethanol and next-generation “advanced” biofuels in the nation’s fuel mix.