Emergy-Based Sustainability of the Peruvian Economy
نویسندگان
چکیده
In this study, emergy evaluation was used to analyze the Peruvian ecological – economic system. The material and energy flows were evaluated in units of solar emergy. The performance of the Peruvian system was assessed through emergy-based indices. The main calculated indicators are the following: (a) Emergy/USD ratio = 1.01 E+13 sej/dollar; (b) Emergy Yield Ratio (EYR) = 9.69; and (c) Environmental Loading Ratio (ELR) = 2.17; which, when combined give the Emergy Sustainability Index (ESI) = 4.47. In order to obtain a general measure of ecological sustainability, the renewability was also calculated: %R = 32%. These values, as well as other data shown in the paper, indicate that the Peruvian system benefits from a great contribution of natural renewable energies to its economy with low environmental loading, but the country contributes to other economies by exporting high volumes of natural resources such as metals.
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