Government Fleet, Mar. 2017, by Shelley Ernst.
http://www.government-fleet.com/channel/biofuels/article/story/2016/03/what-you-need-to-know-about-renewable-diesel.aspx

"What is renewable diesel? The short answer is it’s a fuel that is chemically similar to petroleum diesel, but is 100% renewable and sustainable. In other words, it’s the latest, greenest diesel on the market. But to really understand it, it’s helpful to back up and understand the difference between it and its predecessors, petroleum diesel and biodiesel."