Yes, coal is the biggest possible source for diesel in the future, but then you have to go thru the enviro-nazis to get it. At least with the Algae diesel you can call it "green" technology............
Check out the price for algae in the health food store. It's $25/lb. Thus diesel will never be made from algae even if they get it down to say $5/lb for non food grade algae
Algae to diesel is a pure waste of time. Who funds this crap?