Yes, Dana, there are people interested in finding greener recipes for making biodiesel. They do seem to exist but are generally highly guarded industrial secrets. I got a bit disallusioned by the polluting effect of the basic methanol/lye method as it produces a lot of mirky water in the refining process which is a problem to serious biodiesel producers as the local environment agency (UK) is highly officious and very fond of imposing large fines on businesses that cause pollution. I am currently researching other methods.
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