The National Corn Growers Association, American Farm Bureau Federation, the American Petroleum Institute and six automobile dealers operating dozens of dealerships filed a lawsuit challenging the EPA’s light-duty and medium-duty vehicle emissions standards for model years 2027-2032. This rule, finalized in March, requires 68% of new passenger vehicles and 43% of new medium-duty trucks to be electric by 2032.

The groups claimed the agency exceeded congressional authority with the regulation when the EPA decided on a single tool for fighting climate change.

National Corn Growers Association President Harold Wolle said that solely focusing on electric vehicles ignores the proven benefits of corn ethanol in reducing greenhouse gas emissions. It could take decades to get enough electric vehicles on the road to significantly lower greenhouse gas emissions.

Read more on the challenge to the EV mandate here.