Energy system represents inputs of available energy in the form of power (water, fossil fuels, or sunlight) which are necessary in order to create the material throughput and to move matter from the noneconomic set into the economic set or even out of it again. Energy itself is given off by the system in a less available form, mostly in the form of heat.
Information – seemingly, the most important system, generated by man that dependents mostly on factual knowledge about the planet (not the space). It represents losing knowledge through aging and death and gaining it through birth and education and the ordinary experience of life. Knowledge is why societies can rebuild material capital in times of desperate need, it can also degenerate when passed on from one generation to the other.
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