Most recent alternative fuel besides biodiesel and ethanol

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j0n0x0r
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Does anybody know what's the most recent alternative fuel that has come out beside Biodiesel pro types and Ethanol.Or what the efficiency rate of this fuel is?
 
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Well, none of the technologies are actually 'new', with the possible exception of biodeisel in a picky way. The other major ones being looked at are hydrogen and natural gas. Sorry, but I can't give you any numbers.
 
Butanol.com

Some people are working on Ultra Capacitors that can hold a lot more energy then a battery, even better then EEstores Ultra Caps.
 
Brock said:
Butanol.com

Some people are working on Ultra Capacitors that can hold a lot more energy then a battery, even better then EEstores Ultra Caps.

What are capacitors in detail ?
I don't get how two plates that aren't in contact are able to store high voltages.
 
as far as efficiency, biodesiel i hear is similar in efficiency to convetional diesel, but just better when it comes to emissions