A new USDA study finds that corn-based ethanol is 39 percent lower in greenhouse gas emissions on average than conventional gasoline.

The National Biodiesel Board says in a letter signed by more than 70 other organizations and stakeholders that the very industry they represent is on the line if lawmakers are unable to pass an extension of a $1-per-gallon tax credit.

Ethanol industry groups welcomed the Environmental Protection Agency’s proposed rule that would allow for year-around sale of E15, but refiners were divided over accompanying proposals to reform the biofuel credit market.

A new market is on the way for farmers and companies that want to meet climate change goals, led by a think tank and a coalition of companies and nongovernmental organizations.

Climate change and regulation of greenhouse gases are hot topics in Washington again, and Democratic presidential candidates are pledging to make them major issues in the 2020 election. That’s raising questions for the first time in a decade about the role that farmers could be asked to play in reducing carbon emissions, and how growers could benefit.