(Thanks +John R. Ellis for the link!)

One of the commenters "pjmtavares" said: "Since the amount of solar energy available is practically limitless, the efficiency of the converter, by itself, doesn’t tell us anything. What matters is the efficiency of producing converter units." | "The real question is the efficiency of growing and collecting plants usable as biofuel."

No because even if you assume humanity can tailor make a magic biofuel plant to specification the inescapable inefficiency of photosynthesis coupled with the competition for food plant space makes anywhere you intentionally grow it a waste of space by definition because any society that can custom make energy plants can also custom make food plants.

We already have a farming problem, it's called hunger.

If you want energy (and much much more) explore: #LFTR

http://thoriumremix.com/2011/
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