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Hi TC, , I'm a Lieutenant in the CFA here, been in the local brigade for just on 20 years now. Good to hear you're involved. bye

Hi all, I'm sorry I just have to bite. How much energy does it take to grow the humans into adulthood where they can harvest/thresh the grain?? That is the equivalent of making the tractor. If you want to talk 'how much energy does it take', you have to use the complete analogy, not...