No-tillers have made impassioned pleas for atrazine — a herbicide central to the no-till model — in the past. However, few public comments have been entered into the record yet for the reconsideration.

The agency's ruling provides for the use of both Enlist One and Enlist Duo, which obtained registration renewal from the agency in January with expanded controls for some areas of the country. The company had asked to add an additional 128 counties for approved use, which the EPA granted

Researchers estimate ethanol contributes at least 24% more greenhouse gas emissions than regular gasoline, based on price-driven land use changes. Critics say no-till could make all the difference.