National Biodiesel Board CEO Donnell Rehagen will give the keynote address at the Jan. 29 Iowa Renewable Fuels Summit. “Supporting more than 64,000 jobs and reducing greenhouse gases by up to 86 percent, biodiesel has been a great success for rural economies and our environment,” Rehagen said. The National Biodiesel Board is the national trade association representing the renewable fuel. The summit is free and open to the public, but registration is required.