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Comment Re:40%! (Score 1) 103

Actually photosynthesis tops out at 25% efficiency. 11% using the sun's spectrum.

It all depends on where you want to measure the efficiency.

Can you provide a link for that 25% figure? If my 1% figure is too simplistic or just plain wrong I'd like to know about it - it was years ago I read it.

Comment Re:40%! (Score 2, Informative) 103

One thing that is worth remembering is that plants have an energy conversion efficiency of about 1%, if I remember correctly. So although 12% may seem low it is still a lot better than nature achieves. This is worth bearing in mind when you see fields of oil seed rape or other energy crops being grown - it would be far more efficient to cover the land area with photovoltaics. You could even grow sheep in the gaps between the panels.

Comment Re:some facts about nuclear energy. (Score 1) 622

All 383 pages of it?

For the slow readers among us.....I think you can summarise it as "Whatever the mainstream press tells you is the solution is probably totally unrealistic, and most likely based on some vested interests". But seriously, this is an excellent read. Full of technical facts and details about a whole range of things that consume energy, with order-of-magnitude calculations about how much each could be improved through technological progress.

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