The most interesting biofuel generation

Generations IV and V are in development stage

The most interesting is of course V generation, comparable in the Bible and Ancient Aliens* mentioned manna machine, what starts to dribble fuel after sunrise (VI generation probably works even with moonlight).
Because of price the target group is probably military, as in the hottest conflict places fuel final price could jump up to US$100-250 per liter, but tanks need fuel

Thanks to Zorigto Namsarayev (Зоригто Намсараев)
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* - to Ancient Alien fans bonus video