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Where will all the electric cars be charged?
(www.bbc.co.uk)
This is a most excellent place for technology news and articles.
The problem is that biofuel costs ballooned some years ago and I don't know a single person that still uses it since you get more km with regular gas, biofuels had a sweet magic price for some time but it has gone way up.
That's true of ethanol, but not biodiesel. High cost is a consequence of insufficient supply. Basically, it was how the market stopped further biofuel growth.