482fe97c$1@news.povray.org...
> On the other hand, steam engines are more efficient. (I.e., transform more 
> of the available energy into useful work.) But they're really not 
> "convinient" at all.
Stirling engine generator >>> electricity powered wheels...
http://en.wikipedia.org/wiki/Stirling_engine
>
>> Second thought though is that when you add up the consumption of tens of 
>> thousands of vehicles along a section of major road each day it does 
>> start to amount to quite a lot.
>
> Uh, yeah...
>
>> And all of this is with a liquid that was produced millions of years ago. 
>> It is the captured sunlight that fell on forests in the time of the 
>> dinosaurs.
>
> Indeed.
>
> Still, you'd think it would be possible to somehow take plants living 
> today and transform their tissues into some kind of highly flammable 
> hydrocardon with reasonably efficiency. This would seem the obvious 
> sustainable solution.
There are researches on hydrocarbon synthesis directly from CO2 and H2.
This could be a better solution because arid (but close to the sea )and 
sunny (solar energy) zones could be used instead of fertile lands better for 
food production.

Marc

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