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Originally Posted by McGyver
More recently, 60 Minutes (Feb. 26, 2006) aired a segment on the Montanna governor plans to do open mining of "coal fields" that would produce high grade diesel fuel - w/ the main downside of increased CO2 from this newer production method. Similarly, there have been numerous programs on vegetable oil mix in diesel fuel.
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___I saw the 60 minutes piece; I understood them to say that while the burning of this coal derived diesel fuel produces less CO2, the process of making it produces more than petroleum derived diesel. They plan to ameleorate this by capturing the CO2 & selling it to oil companies to use in pressurizing oil wells.
___The vegetable oil can't be used straight from the fryer, but first must undergo a chemical treatment to remove the glycerin (I think its glycerin

) so it doesn't foul the engines. I don't know what they do with the glycerin and/or the chemical used to separate it.
____All in all it sounds like methane is as big a concern as carbon dioxide in terms of greenhouse gases. Clearly global warming is not ignored & in fact seems a rather popular topic of contention.