SWEETENING THE DIESEL; Synthetic fuel enhances diesel's prospects.(News)

Byline: KEVIN A. WILSON Cute as the headlines are when, say, a fourth-grader makes biodiesel fuel from used French fry oil as a science fair experiment, the reality of global energy demand is such that Mother Earth News subscribers are likely to be disappointed. Tomorrow's transportation systems won't depend on do-it-yourself operations-few people will invest the time and effort if they can buy clean, non-petroleum fuels at the corner station.

And whatever you might think of industrial giants like Shell Oil, they are investing heavily to make sure they are still major players ...

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