Iowa saw sharp growth in E15 and biodiesel sales last year, according to the Iowa Department of Revenue fuel retailer annual report. 

The report showed a 38% in­­crease in E15 sales across Iowa in 2019, to­­taling a re­­c­­ord high 47.4 million gallons. The number of Iowa fuel re­­tail locations offering higher blends of ethanol also reached record...