Could someone help me do a comparision between various fuels?

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Could someone help me do a comparision between various fuels? I need to know which fuel is the best/worst, seeing this out of a environmental and energy perspective.

substance] [combustion]
Etanol -1367 kJ/mole
Metanol -726 kJ/mole
Metan -890 kJ/mole
Olja -50 kJ/mole
Vätgas -286 kJ/mole
 

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I don't want an answer, I want a decent discussion about it!
 
"environmental and energy perspective"

What the hell does that even mean?

The "best" fuel is the one with the highest energy to weight ratio. You've already been given the energies, so lookup the weight for each one and figure out the ratio.
 
The "best" from an environmental standpoint would be the one that pollutes the least. That would be hydrogen. Hydrocarbons can be ranked according to relative hydrogen content.
 
True about hydrogen being hte "best" fuel from an environmental perspective, but then that also depends on how the hydrogen is extracted as this requires energy in itself. You should look at the energy released during combustion verus the CO2 released in the product side if you're thinking about burning the fuels as they are.