Clean you say? Take a guess which of these is clean, green diesel and which is of these is a "synethic crude-like product" AKA sludge slurry:
Which would you rather have -- pay $5.6 million to make the one on the left for $42/barrel while polluting the air or use that same $5.6 million and buy 28 processors that make the fuel on the right for $10/barrel with zero pollution in the air?