It’s been a year of battling back for the resilient and determined biofuel industry in Iowa and other states.

Ethanol and biodiesel demand, which plummeted during the COVID-19 pandemic, is edging back to pre-pandemic levels as Americans get back on the highways. And biofuel production is gearing up to meet the revived demand.

Recent numbers from the Energy Information Administration (EIA) showed that national ethanol production in late June was at...