You can look at the linked study, it's a complicated topic but this is net carbon add. It's a combination of the fossil fuel based fertilizers, tractor fuel, mo

You can look at the linked study, it's a complicated topic but this is net carbon add. It's a combination of the fossil fuel based fertilizers, tractor fuel, moving the corn around, processing the corn into starch, fermenting the starch and moving the end product to blending sites. It also includes carbon released due to changes in land use.