The framework proposed here, i.e. the energy system, allows the selection of a small set of indicators that can be consistently projected and enables the tracking of sustainability.
The key idea of the energy system framework is to see the world as flows of energy where every activity within the anthroposphere and the environment is linked by energy flows.
Moreover, the two systems are interlinked by energy flows, as the energy people use is derived from energy resources in nature and finally results in heat in the environment. In addition, no means of harnessing or applying energy is completely free of adverse environmental impacts. Therefore, Ehrlich calls energy the ultimate resource and, at the same time, the ultimate pollutant (Ehrlich et al., 1970).
Energy is not consumed but converted into different energy forms at various levels of the energy supply chain.
The framework proposed here, i.e. the energy system, allows the selection of a small set of indicators that can be consistently projected and enables the tracking of sustainability. The key idea of the energy system framework is to see the world as flows of energy where every activity within the anthroposphere and the environment is linked by energy flows.Moreover, the two systems are interlinked by energy flows, as the energy people use is derived from energy resources in nature and finally results in heat in the environment. In addition, no means of harnessing or applying energy is completely free of adverse environmental impacts. Therefore, Ehrlich calls energy the ultimate resource and, at the same time, the ultimate pollutant (Ehrlich et al., 1970). Energy is not consumed but converted into different energy forms at various levels of the energy supply chain.
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