The top 10 states in ethanol-production capacity, in gallons per year:

1. Iowa, 866.5 million
2. Illinois, 796 million
3. Nebraska, 537 million
4. South Dakota, 422 million
5. Minnesota, 392.1 million
6. Wisconsin, 172 million
7. Kansas, 109.5 million
8. Missouri, 100 million
9. Indiana, 95 million
10. Tennessee, 65 million