Cheers,
--Joe
There are all sorts of arguments, some almost Biblical in their emotional scope.
Ethanol can be a decent quality fuel, technically. Of that, there is no doubt.
The energy balance issue is to some degree an invalid argument if the people MUST have a liquid fuel and petroleum becomes too scarce to use.
Recently, however, there were published figures that indicated that every square inch of arable land in the USA would have to be devoted to ethanol cropping, and it still wouldn't be enough.
If the worst happens, a war in the Middle East for example, we might be rationing gasoline sooner than later.
Hydrogen fuel is a long way away. It works fine, but where energy is already an issue, hydrogen is hard to come by. Sustainable fusion reactors might make it work....but not soon.
IMHO, biodiesel offers some hope, especially if motor companies can make small efficient diesel engines that can take advantage of it, and then they incorporate it into sensible cars.
If you believe the worst of the doomsday sages, things could get bad very quickly. I think there is definitely 'smoke', but am not sure if it is fire.
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