Well, instead people started using diesel to produce crops. That's um, not a cycle that you can repeat forever, either. It takes a lot more energy to produce the crops than you extract from the sun growing them.
except for trees, pastures, ... not sure what else
Is there a circuit of this somewhere, using machinery powered from fuel made from crops to plant, harvest and produce fuel? I know you can do it if you use humans or animals to do the planting (powering your humans and animals from the food). I thought combustion engines were too inefficient.
trees reproduce on their own and are grown natrually.
they are easily chopped and then the energy gotten back can be more than what took to harvest them. the ability to store and produce lots of energy is a value.
with pastures they could be harvested easy to heat a structure or power a wheel with a certain engine im sure. they grow back.
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