Exergy calculated (see the equations in Exergy) has some shortcomings. It is therefore proposed to consider the eco-exergy found as a 'relative exergy index':
1. It accounts only for the contributions from the organisms' biomass and information in the genes and the life processes resulting from the enzymes. Although these contributions probably are the most important ones, other important contributions cannot be completely excluded.
2. It does not account for the information embodied in the network-the relations between organisms. The
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